Home to the fourth oldest university in the United States, Princeton's community is virtually synonymous with the famous school. Princeton University bears an Ivy League distinction and boasts many features for visitors to enjoy including a beautiful campus ideal for exploring by foot. Historic Nassau Hall, circa 1756, is the largest stone building in the nation. Mercer Street is home to rows of colonial houses that are of interest, including the house where Einstein resided when he researched at Princeton University. There are also many historic sights to visit here including Thomas Clarke House and Princeton Battlefield State Park.