sentences:  The buildings that are part of the historic district were mostly developed in the 1880s through 1930s, following the construction of Central Park.This was further spurred by the construction of the Ninth Avenue Elevated, which provided easy access to Lower Manhattan.Tenements and row houses lined Amsterdam and Columbus Avenues (formerly Tenth and Ninth Avenues, respectively), while more upscale luxury buildings were built on Central Park West (formerly Eighth Avenue).