In 1974, the Embassy received one of the three pre-Columbian stone spheres of Costa Rica that came to the United States as part of an agreement that had been negotiated in 1971 between American art specialist Samuel Adams Green and the Museo Nacional de Costa Rica together with the Costa Rican Ministry of Foreign Affairs and Ministry of Culture.[4] The two larger spheres went to Fairmount Park in Philadelphia, where they were displayed in 1976[5] together with other monumental sculptures, before going into storage[6] at the warehouses of the Fairmont Park Association.[7] The one in Washington D.C. is displayed in the streetside yard of the Embassy building, as a symbol of national identity.