Society Hill holds a notable landmark in the history of African-Americans in the city. In 1787 Richard Allen led fellow blacks who left St. George's Methodist Church as a protest against the segregated worship. Allen, a lay minister and former slave who had bought his freedom from the Chew family of Germantown, purchased this site in 1791. It's believed to be the country's oldest parcel of land continuously owned by African-Americans. When the African Methodist Episcopal Church was formed in 1816, Allen was its first bishop. The current church, the fourth on the site, is an example of the 19th-century Romanesque Revival style, with broad arches and a square corner tower, opalescent stained-glass windows, and stunning woodwork. The earlier church buildings were the site of a school where Allen taught slaves to read and also a stop on the Underground Railroad. Allen's tomb and a small museum are on the lower level.