Upon opening, the Seagram Building was widely praised for its design, and the building became known as an unofficial landmark. Its design was copied by other structures worldwide. Within New York City, the Seagram Building helped influence the 1961 Zoning Resolution, which provided developers with a zoning "bonus" for including plazas outside their buildings. The Seagram Building's exterior, lobby, and Four Seasons Restaurant were designated as official city landmarks by the New York City Landmarks Preservation Commission in 1989, and it was added to the National Register of Historic Places in 2006.