(l. to r.) 59, 61, 63, and 65-69 Fourth Avenue. All these building date to the 19th century, and all are intact to their original construction on the exterior except No. 63, which was altered in the 20th century. Several housed important booksellers and publishers in the 20th century, when this area was a center of both industries. Additionally, No. 61 housed the home and studios of artists Robert Indiana and Robert Motherwell, as well as revolutionary publisher Barney Rossett.

For more information on the history of these and other buildings South of Union Square, click here.

See all Architecture of South of Union Square photos here.

Photos by Dylan Chandler