778 Park Avenue is a luxury residential building in the Upper East Side Historic District on the northeast corner of 73rd Street and Park Avenue. The 18-story English Renaissance apartment house was designed by Rosario Candela who is widely considered to have been America's greatest designer of luxury apartment buildings. It was built in 1931 and is one of the most coveted buildings in New York City. It has a four-story limestone base. In 1983 it won the first annual Excellence in Conservation Award from Friends of the Upper East Side.