Mellon Square was donated to the city of Pittsburgh by Richard K. and Paul Mellon, to provide open space in the midst of a dense urban landscape and to provide a setting for the two Mellon-related skyscrapers that flank it: Three Mellon Bank Center (1952) and the Alcoa Building (1953) -- both by the New York architects Harrison and Abramovitz. In addition, it provides a panoramic view of the extraordinary buildings that ring the Square. Mellon Square is a 1.4 acre park built on top of a 1800 car parking garage. It was listed on the National Register of Historic Places in 1985. The site was designed by Simond and Simonds landscape architects. It provides a place for people working in the district to sit and eat lunch with views of the surrounding architecture.