The 14th Regiment Armory, also known as the Eighth Avenue Armory and the Park Slope Armory, is a historic National Guard armory building located on Eighth Avenue between 14th and 15th Streets in the South Slope neighborhood of Brooklyn, New York City, United States. The building is a brick and stone castle-like structure, and designed to be reminiscent of medieval military structures in Europe. It was built in 1891–95 and was designed in the Late Victorian style by William A. Mundell.