Mr. Justice Stevens
delivered the opinion of the Court.
These appeals challenge the constitutionality of New York statutes that authorize police officers to enter a private residence without a warrant and with force, if necessary, to make a routine felony arrest.
The important constitutional question presented by this challenge has been expressly left open in a number of our prior opinions. In United States v. Watson, 423 U. S. 411, we upheld a warrantless “midday public arrest,” expressly noting that the case did not pose “the still unsettled ques[575]*575tion . . . 'whether and under what circumstances an officer may enter a suspect’s home to make a warrantless arrest.’ ” Id., at 418, n. 6.1 The question has been answered in different ways by other appellate courts. The Supreme Court of Florida rejected the constitutional attack,2 as did the New York Court of Appeals in this case. The courts of last resort in 10 other States, however, have held that unless special circumstances are present, warrantless arrests in the home are unconstitutional.3 Of the seven United States Courts of Appeals that have considered the question, five have expressed the opinion that such arrests are unconstitutional.4
[576]*576Last Term we noted probable jurisdiction of these appeals in order to address that question. 439 U. S. 1044. After hearing oral argument, we set the case for reargument this Term. 441 U. S. 930. We now reverse the New York Court of Appeals and hold that the Fourth Amendment to the United States Constitution, made applicable to the States by the Fourteenth Amendment, Mapp v. Ohio, 367 U. S. 643; Wolf v. Colorado, 338 U. S. 25, prohibits the police from making a warrantless and nonconsensua! entry into a suspect’s home in order to make a routine felony arrest.
We first state the facts of both cases in some detail and put to one side certain related questions that are not presented by these records. We then explain why the New York statutes are not consistent with the Fourth Amendment and why the reasons for upholding warrantless arrests in a public place do not apply to warrantless invasions of the privacy of the home.
I
On January 14, 1970, after two days of intensive investigation, New York detectives had assembled evidence sufficient to establish probable cause to believe that Theodore Payton had murdered the manager of a gas station two days earlier. At about 7:30 a. m. on January 15, six officers went to Pay-ton’s apartment in the Bronx, intending to arrest him. They had not obtained a warrant. Although light and music emanated from the apartment, there was no response to their knock on the metal door. They summoned emergency assistance and, about 30 minutes later, used crowbars to break open the door and enter the apartment. No one was there. In plain view, however, was a 30-caliber shell casing that was [577]*577seized and later admitted into evidence at Payton’s murder trial.5
In due course Payton surrendered to the police, was indicted for murder, and moved to suppress the evidence taken from his apartment. The trial judge held that the warrantless and forcible entry was authorized by the New York Code of Criminal Procedure,6 and that the evidence in plain view was properly seized. He found that exigent circumstances justified the officers’ failure to announce their purpose before entering the apartment as required by the statute.7 He had no [578]*578occasion, however, to decide whether those circumstances also would have justified the failure to obtain a warrant, because he concluded that the warrantless entry was adequately supported by the statute without regard to the circumstances. The Appellate Division, First Department, summarily affirmed.8
On March 14, 1974, Obie Riddick was arrested for the commission of two armed robberies that had occurred in 1971. He had been identified by the victims in June 1973, and in January 1974 the police had learned his address. They did not obtain a warrant for his arrest. At about noon on March 14, a detective, accompanied by three other officers, knocked on the door of the Queens house where Riddick was living. When his young son opened the door, they could see Riddick sitting in bed covered by a sheet. They entered the house and placed him under arrest. Before permitting him to dress, they opened a chest of drawers two feet from the bed in search of weapons and found narcotics and related paraphernalia. Riddick was subsequently indicted on narcotics charges. At a suppression hearing, the trial judge held that the warrantless entry into his home was authorized by the revised New York statute,9 and that the search of the imme[579]*579diate area was reasonable under Chimel v. California, 395 U. S. 752.10 The Appellate Division, Second Department, affirmed the denial of the suppression motion.11
The New York Court of Appeals, in a single- opinion, affirmed the convictions of both Payton and Riddick. 45 N. Y. 2d 300, 380 N. E. 2d 224 (1978). The court recognized that the question whether and under what circumstances an officer may enter a suspect’s home to make a warrantless arrest had not been settled either by that court or by this Court.12 In answering that question, the majority of four judges relied primarily on its perception that there is a
“. . . substantial difference between the intrusion which attends an entry for the purpose of searching the premises and that which results from an entry for the purpose of [580]*580making an arrest, and [a] significant difference in the governmental interest in achieving the objective of the intrusion in the two instances.” Id., at 310, 380 N. E. 2d, at 228-229.13
[581]*581The majority supported its holding by noting the “apparent historical acceptance” of warrantless entries to make felony arrests, both in the English common law and in the practice of many American States.14
Three members of the New York Court of Appeals dissented on this issue because they believed that the Constitution requires the police to obtain a “warrant to enter a home in order to arrest or seize a person, unless there are exigent circumstances.” 15 Starting from the premise that, except in carefully circumscribed instances, “the Fourth Amendment forbids police entry into a private home to search for and seize an object without a warrant,”16 the dissenters reasoned that an arrest of the person involves an even greater invasion of privacy and should therefore be attended with at least as [582]*582great a measure of constitutional protection.17
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Mr. Justice Stevens
delivered the opinion of the Court.
These appeals challenge the constitutionality of New York statutes that authorize police officers to enter a private residence without a warrant and with force, if necessary, to make a routine felony arrest.
The important constitutional question presented by this challenge has been expressly left open in a number of our prior opinions. In United States v. Watson, 423 U. S. 411, we upheld a warrantless “midday public arrest,” expressly noting that the case did not pose “the still unsettled ques[575]*575tion . . . 'whether and under what circumstances an officer may enter a suspect’s home to make a warrantless arrest.’ ” Id., at 418, n. 6.1 The question has been answered in different ways by other appellate courts. The Supreme Court of Florida rejected the constitutional attack,2 as did the New York Court of Appeals in this case. The courts of last resort in 10 other States, however, have held that unless special circumstances are present, warrantless arrests in the home are unconstitutional.3 Of the seven United States Courts of Appeals that have considered the question, five have expressed the opinion that such arrests are unconstitutional.4
[576]*576Last Term we noted probable jurisdiction of these appeals in order to address that question. 439 U. S. 1044. After hearing oral argument, we set the case for reargument this Term. 441 U. S. 930. We now reverse the New York Court of Appeals and hold that the Fourth Amendment to the United States Constitution, made applicable to the States by the Fourteenth Amendment, Mapp v. Ohio, 367 U. S. 643; Wolf v. Colorado, 338 U. S. 25, prohibits the police from making a warrantless and nonconsensua! entry into a suspect’s home in order to make a routine felony arrest.
We first state the facts of both cases in some detail and put to one side certain related questions that are not presented by these records. We then explain why the New York statutes are not consistent with the Fourth Amendment and why the reasons for upholding warrantless arrests in a public place do not apply to warrantless invasions of the privacy of the home.
I
On January 14, 1970, after two days of intensive investigation, New York detectives had assembled evidence sufficient to establish probable cause to believe that Theodore Payton had murdered the manager of a gas station two days earlier. At about 7:30 a. m. on January 15, six officers went to Pay-ton’s apartment in the Bronx, intending to arrest him. They had not obtained a warrant. Although light and music emanated from the apartment, there was no response to their knock on the metal door. They summoned emergency assistance and, about 30 minutes later, used crowbars to break open the door and enter the apartment. No one was there. In plain view, however, was a 30-caliber shell casing that was [577]*577seized and later admitted into evidence at Payton’s murder trial.5
In due course Payton surrendered to the police, was indicted for murder, and moved to suppress the evidence taken from his apartment. The trial judge held that the warrantless and forcible entry was authorized by the New York Code of Criminal Procedure,6 and that the evidence in plain view was properly seized. He found that exigent circumstances justified the officers’ failure to announce their purpose before entering the apartment as required by the statute.7 He had no [578]*578occasion, however, to decide whether those circumstances also would have justified the failure to obtain a warrant, because he concluded that the warrantless entry was adequately supported by the statute without regard to the circumstances. The Appellate Division, First Department, summarily affirmed.8
On March 14, 1974, Obie Riddick was arrested for the commission of two armed robberies that had occurred in 1971. He had been identified by the victims in June 1973, and in January 1974 the police had learned his address. They did not obtain a warrant for his arrest. At about noon on March 14, a detective, accompanied by three other officers, knocked on the door of the Queens house where Riddick was living. When his young son opened the door, they could see Riddick sitting in bed covered by a sheet. They entered the house and placed him under arrest. Before permitting him to dress, they opened a chest of drawers two feet from the bed in search of weapons and found narcotics and related paraphernalia. Riddick was subsequently indicted on narcotics charges. At a suppression hearing, the trial judge held that the warrantless entry into his home was authorized by the revised New York statute,9 and that the search of the imme[579]*579diate area was reasonable under Chimel v. California, 395 U. S. 752.10 The Appellate Division, Second Department, affirmed the denial of the suppression motion.11
The New York Court of Appeals, in a single- opinion, affirmed the convictions of both Payton and Riddick. 45 N. Y. 2d 300, 380 N. E. 2d 224 (1978). The court recognized that the question whether and under what circumstances an officer may enter a suspect’s home to make a warrantless arrest had not been settled either by that court or by this Court.12 In answering that question, the majority of four judges relied primarily on its perception that there is a
“. . . substantial difference between the intrusion which attends an entry for the purpose of searching the premises and that which results from an entry for the purpose of [580]*580making an arrest, and [a] significant difference in the governmental interest in achieving the objective of the intrusion in the two instances.” Id., at 310, 380 N. E. 2d, at 228-229.13
[581]*581The majority supported its holding by noting the “apparent historical acceptance” of warrantless entries to make felony arrests, both in the English common law and in the practice of many American States.14
Three members of the New York Court of Appeals dissented on this issue because they believed that the Constitution requires the police to obtain a “warrant to enter a home in order to arrest or seize a person, unless there are exigent circumstances.” 15 Starting from the premise that, except in carefully circumscribed instances, “the Fourth Amendment forbids police entry into a private home to search for and seize an object without a warrant,”16 the dissenters reasoned that an arrest of the person involves an even greater invasion of privacy and should therefore be attended with at least as [582]*582great a measure of constitutional protection.17 The dissenters noted “the existence of statutes and the American Law Institute imprimatur codifying the common-law rule authorizing warrantless arrests in private homes” and acknowledged that “the statutory authority of a police officer to make a warrant-less arrest in this State has been in effect for almost 100 years,” but concluded that “neither antiquity nor legislative unanimity can be determinative of the grave constitutional question presented” and “can never be a substitute for reasoned analysis.” 18
Before addressing the narrow question presented by these appeals,19 we put to one side other related problems that are [583]*583not presented today. Although it is arguable that the war-rantless entry to effect Payton’s arrest might have been justified by exigent circumstances, none of the New York courts relied on any such justification. The Court of Appeals majority treated both Payton’s and Riddick’s cases as involving routine arrests in which there was ample time to obtain a warrant,20 and we will do the same. Accordingly, we have no occasion to consider the sort of emergency or dangerous situation, described in our cases as “exigent circumstances,” that would justify a warrantless entry into a home for the purpose of either arrest or search.
Nor do these cases raise any question concerning the authority of the police, without either a search or arrest warrant, to enter a third party’s home to arrest a suspect. The police broke into Payton’s apartment intending to arrest Payton, and they arrested Riddick in his own dwelling. We also note that in neither case is it argued that the police lacked probable cause to believe that the suspect was at home when they entered. Finally, in both cases we are dealing with entries into homes made without the consent of any occupant. In Payton, the police used crowbars to break down the door and in Riddick, although his 3-year-old son answered the door,' the police entered before Riddick had an opportunity either to object or to consent.
II
It is familiar history that indiscriminate searches and seizures conducted under the authority of “general warrants” were the immediate evils that motivated the framing and adoption of the Fourth Amendment.21 Indeed, as originally [584]*584proposed in the House of Representatives, the draft contained only one clause, which directly imposed limitations on the issuance of warrants, but imposed no express restrictions on warrantless searches or seizures.22 As it was ultimately adopted, however, the Amendment contained two separate clauses, the first protecting the basic right to be free from unreasonable searches and seizures and the second requiring that warrants be particular and supported by probable cause.23 The Amendment provides:
“The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches [585]*585and seizures, shall not be violated, and no Warrants shall issue, but upon probable cause, supported by Oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized.’’
It is thus perfectly clear that the evil the Amendment was designed to prevent was broader than the abuse of a general warrant. Unreasonable searches or seizures conducted without any warrant at all are condemned by the plain language of the first clause of the Amendment. Almost a century ago the Court stated in resounding terms that the principles reflected in the Amendment “reached farther than the concrete form” of the specific cases that gave it birth, and “apply to all invasions on the part of the government and its employes of the sanctity of a man’s home and the privacies of life.” Boyd v. United States, 116 U. S. 616, 630. Without pausing to consider whether that broad language may require some qualification, it is sufficient to note that the warrantless arrest of a person is a species of seizure required by the Amendment to be reasonable. Beck v. Ohio, 379 U. S. 89. Cf. Delaware v. Prouse, 440 U. S. 648. Indeed, as Me. Justice Powell noted in his concurrence in United States v. Watson, the arrest of a person is “quintessential a seizure.” 423 U. S., at 428.
The simple language of the Amendment applies equally to seizures of persons and to seizures of property. Our analysis in this case may therefore properly commence with rules that have been well established in Fourth Amendment litigation involving tangible items. As the Court reiterated just a few years ago, the “physical entry of the home is the chief evil against which the wording of the Fourth Amendment is directed.” United States v. United States District Court, [586]*586407 U. S. 297, 313. And we have long adhered to the view that the warrant procedure minimizes the danger of needless intrusions of that sort.24
It is a “basic principle of Fourth Amendment law” that searches and seizures inside a home without a warrant are presumptively unreasonable.25 Yet it is also well settled that [587]*587objects such as weapons or contraband found in a public place may be seized by the police without a warrant; The seizure of property in plain view involves no invasion of privacy and is presumptively reasonable, assuming that there is probable cause to associate the property with criminal activity. The distinction between a warrantless seizure in an open area and such a seizure on private premises was plainly stated in G. M. Leasing Corp. v. United States, 429 U. S. 338, 354:
“It is one thing to seize without a warrant property resting in an open area or seizable by levy without an intrusion into privacy, and it is quite another thing to effect a warrantless seizure of property, even that owned by a corporation, situated on private premises to which access is not otherwise available for the seizing officer.”
As the late Judge Leventhai recognized, this distinction has equal force when the seizure of a person is involved. Writing on the constitutional issue now before us for the United States Court of Appeals for the District of Columbia Circuit sitting en banc, Dorman v. United States, 140 U. S. App. D. C. 313, 435 F. 2d 385 (1970), Judge Leventhai first noted the settled rule that warrantless arrests in public places are valid. He immediately recognized, however, that
“[a] greater burden is placed ... on officials who enter a home or dwelling without consent. Freedom from intrusion into the home or dwelling is the archetype of the privacy protection secured by the Fourth Amendment.” Id., at 317, 435 F. 2d, at 389. (Footnote omitted.)
His analysis of this question then focused on the long-settled premise that, absent exigent circumstances, a warrant-[588]*588less entry to search for weapons or contraband is unconstitutional even when a felony has been committed and there is probable cause to believe that incriminating evidence will be found within.26 He reasoned that the constitutional protection afforded to the individual’s interest in the privacy of his own home is equally applicable to a warrantless entry for the purpose of arresting a resident of the house; for it is inherent in such an entry that a search for the suspect may be required before he can be apprehended.27 Judge Leventhal concluded that an entry to arrest and an entry to search for and to seize property implicate the same interest in preserving the privacy and the sanctity of the home, and justify the same level of constitutional protection.
This reasoning has been followed in other Circuits.28 Thus, the Second Circuit recently summarized its position:
“To be arrested in the home involves not only the inva[589]*589sion attendant to all arrests but also an invasion of the sanctity of the home. This is simply too substantial an invasion to allow without a warrant, at least in the absence of exigent circumstances, even when it is accomplished under statutory authority and when probable cause is clearly present.” United States v. Reed, 572 F. 2d 412, 423 (1978), cert. denied sub nom. Goldsmith v. United States, 439 U. S. 913.
We find this reasoning to be persuasive and in accord with this Court’s Fourth Amendment decisions.
The majority of the New York Court of Appeals, however, suggested that there is a substantial difference in the relative intrusiveness of an entry to search for property and an entry to search for a person. See n. 13, supra. It is true that the area that may legally be searched is broader when executing a search warrant than when executing an arrest warrant in the home. See Chimel v. California, 395 U. S. 752. This difference may be more theoretical than real, however, because the police may need to check the entire premises for safety reasons, and sometimes they ignore the restrictions on searches incident to arrest.29
But the critical point is that any differences in the intrusiveness of entries to search and entries to arrest are merely ones of degree rather than kind. The two intrusions share this fundamental characteristic: the breach of the entrance to an individual’s home. The Fourth Amendment protects the individual’s privacy in a variety of settings. In none is the zone of privacy more clearly defined than when bounded by the unambiguous physical dimensions of an individual’s home — a zone that finds its roots in clear and specific constitutional terms: “The right of the people to be secure in their . . . houses . . . shall not be violated.” That language unequivocally establishes the proposition that “[a]t the very [590]*590core [of the Fourth Amendment] stands the right of a man to retreat into his own home and there be free from unreasonable governmental intrusion.” Silverman v. United States, 365 U. S. 505, 511. In terms that apply equally to seizures of property and to seizures of persons, the Fourth Amendment has drawn a firm line at the entrance to the house. Absent exigent circumstances, that threshold may not reasonably be crossed without a warrant.
Ill
Without contending that United States v. Watson, 423 U. S. 411, decided the question presented by these appeals, New York argues that the reasons that support the Watson holding require a similar result here. In Watson the Court relied on (a) the well-settled commonlaw rule that, a warrantless arrest in a public place is valid if the arresting officer had probable cause to believe the suspect is a felon;30 (b) the clear consensus among the States adhering to that well-settled common-law rule;31 and (c) the expression of the judgment of Congress that such an arrest is “reasonable.” 32 We con[591]*591sider each of these reasons as it applies to a warrantless entry into a home for the purpose of making a routine felony arrest.
A
An examination of the common-law understanding of an officer’s authority to arrest sheds light on the obviously relevant, if not entirely dispositive,33 consideration of what the Framers of the Amendment might have thought to be reasonable. Initially, it should be noted that the common-law rules of arrest developed in legal contexts that substantially differ from the cases now before us. In these cases, which involve application of the exclusionary rule, the issue is whether cer[592]*592tain evidence is admissible at trial.34 See Weeks v. United States, 232 U. S. 383. At common law, the question whether an arrest was authorized typically arose in civil damages actions for trespass or false arrest, in which a constable's authority to make the arrest was a defense. See, e. g., Leach v. Money, 19 How. St. Tr. 1001, 97 Eng. Rep. 1075 (K. B. 1765). Additionally, if an officer was killed while attempting to effect an arrest, the question whether the person resisting the arrest was guilty of murder or manslaughter turned on whether the officer was acting within the bounds of his authority. See M. Foster, Crown Law 308, 312 (1762). See also West v. Cabell, 153 U. S. 78, 85.
A study of the common law on the question whether a constable had the authority to make warrantless arrests in the home on mere suspicion of a felony — as distinguished from an officer’s right to arrest for a crime committed in his presence— reveals a surprising lack of judicial decisions and a deep divergence among scholars.
The most cited evidence of the common-law rule consists of an equivocal dictum in a case actually involving the sheriff’s authority to enter a home to effect service of civil process. In Semayne’s Case, 5 Co. Rep. 91a, 91b, 77 Eng. Rep. 194, 195-196 (K. B. 1603), the Court stated:
“In all cases when the King is party, the Sheriff (if the doors be not open) may break the party’s house, • either to arrest him, or to do other execution of the K.’s process, if otherwise he cannot enter. But before he breaks it, he ought to signify the cause of his coming, and to make request to open doors; and that appears well by the stat. of Westm. 1. c. 17. (which is but an affirmance of the common law) as hereafter appears, for the law without a default in the owner abhors the destruc[593]*593tion or breaking of any house (which is for the habitation and safety of man) by which great damage and inconvenience might ensue to the party, when no default is in him; for perhaps he did not know of the process, of which, if he had notice, it is to be presumed that he would obey it, and that appears by the book in 18 E. 2. Execut. 252. where it is said, that the K.’s officer who comes to do execution, &c. may open the doors which are shut, and break them, if he cannot have the keys; which proves, that he ought first to demand them, 7 E. 3. 16.” (Footnotes omitted.)
This passage has been read by some as describing an entry without a warrant. The context strongly implies, however, that the court was describing the extent of authority in executing the King’s writ. This reading is confirmed by the phrase “either to arrest him, or to do other execution of the K.’s process” and by the further point that notice was necessary because the owner may “not know of the process.” In any event, the passage surely cannot be said unambiguously to endorse warrantless entries.
The cómmon-law commentators disagreed sharply on the subject.35 Three distinct views were expressed. Lord Coke, [594]*594widely recognized by the American colonists “as the greatest authority of his time on the laws of England,” 36 clearly viewed a warrantless entry for the purpose of arrest to be illegal.37 [595]*595Bum, Foster, and Hawkins agreed,38 as did East and Russell, though the latter two qualified their opinions by stating that if an entry to arrest was made without a warrant, the officer was perhaps immune from liability for the trespass if the suspect was actually guilty.39 Blackstone, Chitty, and Stephen took the opposite view, that entry to arrest without a warrant was legal,40 though Stephen relied on Blackstone who, along with Chitty, in turn relied exclusively on Hale. But Hale’s view was not quite so unequivocally expressed.41 [596]*596Further, Hale appears to rely solely on a statement in an early Yearbook, quoted in Burdett v. Abbot, 14 East 1, 155, 104 Eng. Rep. 501, 560 (K. B. 1811): 42
“ 'that for felony, or suspicion of felony, a man may break open the house to take the felon; for it is for the commonweal to take them.’ ”
Considering the diversity of views just described, however, it is clear that the statement was never deemed authoritative. Indeed, in Burdett, the statement was described as an “extrajudicial opinion.” Ibid43
It is obvious that the common-law rule on warrantless home arrests was not as clear as the rule on arrests in public places. Indeed, particularly considering the prominence of Lord Coke, the weight of authority as it appeared to the Framers was to the effect that a warrant was required, or at the minimum that there were substantial risks in proceeding without one. The common-law sources display a sensitivity to privacy interests that could not have been lost on the Framers. The zealous and frequent repetition of the adage that a “man’s house is his castle,” made it abundantly clear that both in England44 [597]*597and in the Colonies “the freedom of one’s house” was one of the most vital elements of English liberty.45
Thus, our study of the relevant common law does not provide the same guidance that was present in Watson. Whereas [598]*598the rule concerning the validity of an arrest in a public place was supported by cases erectly in point and by the unanimous views of the commentators, we have found no direct authority supporting forcible entries into a home to make a routine arrest and the weight of the scholarly opinion is somewhat to the contrary. Indeed, the absence of any 17th- or 18th-century English cases directly in point, together with the unequivocal endorsement of the tenet that “a man’s house is his castle,” strongly suggests that the prevailing practice was not to make such arrests except in hot pursuit or when authorized by a warrant. Cf. Agnello v. United States, 269 U. S. 20, 33. In all events, the issue is not one that can be said to have been definitively settled by the common law at the time the Fourth Amendment was adopted.
B
A majority of the States that have taken a position on the question permit warrantless entry into the home to arrest even in the absence of exigent circumstances. At this time, 24 States permit such warrantless entries;46 15 States clearly [599]*599prohibit them, though 3 States do so on federal constitutional grounds alone; 47 and 11 States have apparently taken no position on the question48
But these current figures reflect a significant decline during the last decade in the number of States permitting warrantless entries for arrest. Becent dicta in this Court raising questions about the practice, see n. 1, supra, and Federal Courts of Appeals’ decisions on point, see n. 4, supra, have led state courts to focus on the issue. Virtually all of the state courts that have had to confront the constitutional issue directly have held warrantless entries into the home to arrest to be invalid in the absence of exigent circumstances. See nn. 2, 3, supra. Three state courts have relied on Fourth Amendment [600]*600grounds alone, while seven have squarely placed their decisions on both federal and state constitutional grounds.49 A number of other state courts, though not having had to confront the issue directly, have recognized the serious nature of the constitutional question.50 Apparently, only the Supreme Court of Florida and the New York Court of Appeals in this case have expressly upheld warrantless entries to arrest in the face of a constitutional challenge.51
A longstanding, widespread practice is not immune from constitutional scrutiny. But neither is it to be lightly brushed aside. This is particularly so when the constitutional standard is as amorphous as the word “reasonable,” and when custom and contemporary norms necessarily. play such a large role in the constitutional analysis. In this case, although the weight of state-law authority is clear, there is by no means the kind of virtual unanimity on this question that was present in United States v. Watson, with regard to warrantless arrests in public places. See 423 U. S., at 422-423. Only 24 of the 50 States currently sanction warrant-less entries into the home to arrest, see nn. 46-48, supra, and there is an obvious declining trend. Further, the strength of the trend is greater than the numbers alone indicate. Seven state courts have recently held that warrantless home arrests violate their respective State Constitutions. See n. 3, supra. That is significant because by invoking a state constitutional provision, a state court immunizes its decision from review by this Court.52 This heightened degree of immutability underscores the depth of the principle underlying the result.
[601]*601c
No congressional determination that warrantless entries into the home áre “reasonable” has been called to our attention. None of the federal statutes cited in the Watson opinion reflects any such legislative judgment.53 Thus, that support for the Watson holding finds no counterpart in this case.