The oldest house remaining in Greenwich Village is the Isaacs-Hendricks House, at 77 Bedford Street (built 1799, much altered and enlarged 1836, third story 1928). When the Church of St. Luke in the Fields was founded in 1820 it stood in fields south of the road (now Christopher Street) that led from Greenwich Lane (now Greenwich Avenue) down to a landing on the North River. In 1822, a yellow fever epidemic in New York encouraged residents to flee to the healthier air of Greenwich Village, and afterwards many stayed. The future site of Washington Square was a potter's field from 1797 to 1823 when up to 20,000 of New York's poor were buried here, and still remain. The handsome Greek revival rowhouses on the north side of Washington Square were built about 1832, establishing the fashion of Washington Square and lower Fifth Avenue for decades to come. Well into the 19th century, the district of Washington Square was considered separate from Greenwich Village.