In 1984, in celebration of Tel Aviv's 75th year, an exhibition was held at the Tel Aviv Museum of Art entitled "White City, International Style Architecture in Israel, Portrait of an Era". Some sources trace the origin of the term "White City" to this exhibition and its curator Michael Levin, some to the poet Nathan Alterman. The 1984 exhibition traveled to New York, to the Jewish Museum. In 1994, a conference took place at the UNESCO headquarters, entitled "World Conference on the International Style in Architecture." Credit was given to Israeli artist Dani Karavan who made a sculpture garden at the headquarters, and had earlier made a sculptural environment entitled "Kikar Levana" that was inspired by the White City. In 1996, Tel Aviv's White City was listed as a World Monuments Fund endangered site. In 2003, UNESCO named Tel Aviv a World Heritage Site for its treasure of modern architecture.