1960s, the Redevelopment Authority bought and demolished buildings and, by the mid-1970s, owned one-fifth of the neighborhood. By this time, however, federal money available for urban renewal had declined and the city was no longer able to fund the renewal of Washington Square West. Buildings razed by the city in the 1960s and 1970s were left as empty lots and the neighborhood was left in a state of decline. Through the late 1970s and 1980 began a slow recovery without the aid of the large-scale redevelopment that had occurred in Society Hill. The 1990s saw a shift in the neighborhood as Mayor Ed Rendell encouraged investment in Center City and gentrification began to take hold. By the end of the 1990s and early 2000s, the neighborhood had transformed into an economically vital community. The Washington Square West Historic District was added to the National Register of Historic Places in 1984. The area encompasses 450 contributing buildings. Located in the district and separately listed are the Clinton Street Historic District, Roberts-Quay House, and Portico Row. The Gayborhood The area approximately bounded by Chestnut, Pine, Juniper and 11th streets within Washington Square West is known as The Gayborhood. It is so-named because of its large concentration of LGBT-friendly small businesses, services, restaurants, and gay bars. It was also a red light district and center of Philadelphia's gay bathhouse culture in the 1970s and 1980s. The area is the location for Philadelphia's annual OutFest: National Coming Out Day celebration. On 18 April 2007, the city of Philadelphia officially recognized the area by adding 36 gay pride rainbow flag symbols to street signs within the Gayborhood area. 32 additional signs were added in June 2010. On 25 June 2015, rainbows, indicating LGBT pride, were painted onto crosswalks at the intersection of 13th and Locust streets. Its success as a city neighborhood has led to several attempts at large-scale private development in the Gayborhood in the 2000s. In 2002, developer Tony Goldman attempted to change 13th Street and its surroundings into the "Blocks Below Broad" or "B3", with the launch of several new retail establishments. The attempt failed but was repeated in 2006 by a merchants association organized by James McManaman. While the organization has attempted to re-brand the neighborhood "Midtown Village" and launched new retail establishments along 13th Street, long-time residents, professionals, and proprietors refer to the area as the Gayborhood or Center City.