Since then, preservation has been a part of the Village ethos. Shortly after the New York City Landmarks Preservation Commission (LPC) was established in 1965, it acted to protect parts of Greenwich Village, designating the small Charlton-King-Vandam Historic District in 1966, which contains the city's largest concentration of row houses in the Federal style, as well as a significant concentration of Greek Revival houses, and the even smaller MacDougal-Sullivan Gardens Historic District in 1967, a group of 22 houses sharing a common back garden, built in the Greek Revival style and later renovated with Colonial Revival façades. In 1969, the LPC designated the Greenwich Village Historic District – which remained the city's largest for four decades – despite preservationists' advocacy for the entire neighborhood to be designated an historic district. Advocates continued to pursue their goal of additional designation, spurred in particular by the increased pace of development in the 1990s.