We therefore regard the area "immediately surrounding and associated with the home" — what our cases call the curtilage — as "part of the home itself for Fourth Amendment purposes." Oliver, supra, at 180, 104 S.Ct. 1735. That principle has ancient and durable roots. Just as the distinction between the home and the open fields is "as old as the common law," Hester, supra, at 59, 44 S.Ct. 445, so too is the identity of home and what Blackstone called the "curtilage or homestall," for the "house protects and privileges all its branches and appurtenants." 4 W. Blackstone, Commentaries on the Laws of England 223, 225 (1769). This area around the home is "intimately linked to the home, both physically and psychologically," and is where "privacy expectations are most heightened." California v. Ciraolo, 476 U.S. 207, 213, 106 S.Ct. 1809, 90 L.Ed.2d 210 (1986).