Can you guess when and where this photograph was taken? We'll update later with the answers and more details. (This is sort of the reverse image of the Last Brownstone Standing.)

Update: The photo is of West 133rd St in Manhattan, in 1877. When dependable elevated rail service reached the area in the 1860s and 70s, it set off a firestorm of speculative development, creating streetscapes of rowhouses separated by vast stretches of vacant land. As more and more wealthy families (as well as recent British and German immigrants) moved to the area, the streets filled in with churches, commercial buildings, schools, brownstones and luxury apartment houses, and by 1900, with the opening of the 145th Street subway station, the neighborhood was one of the most booming and fashionable in the city.

Eventually Harlem actually became overbuilt, and a real estate crash in 1904 led to massive vacancies and sharply dropping rents. Several African-American-run real estate companies set up shop in the neighborhood in the ensuing years, leading to an influx of black middle-class families moving to Harlem, and setting the stage for the Harlem Renaissance of the 1920s.