fleeing Europe brought not only Bauhaus ideas; the architectural ideas of Le Corbusier were also mixed in. Furthermore, Erich Mendelsohn was not formally associated with the Bauhaus, though he had several projects in Israel in the 1930s as did Carl Rubin, an architect from Mendelsohn's office. In the 1930s in Tel Aviv, many architectural ideas were converging and Tel Aviv was the ideal place for them to be tested. 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. Adaptation to local climate However, the architecture had to be adapted to suit the extremes of the Mediterranean and desert climate. White and light colors reflected the heat. Walls not only provided privacy but protected against the sun. Large areas of glass that let in the light, a key element of the Bauhaus style in Europe, were replaced with small recessed windows that limited the heat and glare. Long, narrow balconies, each shaded by the balcony above it, allowed residents to catch the breeze blowing in from the sea to the west. Pitched roofs were replaced with flat ones, providing a common area where residents could socialize in the cool of the evening. Buildings were raised on pillars (pilotis), the first being the 1933 Engel House designed by Zeev Rechter. These allow the wind to blow under and cool the apartments, as well as providing a play area for children. In 1935, at the office building Beit Hadar, steel frame structure was introduced, a technique which facilitates opening the first floor for such purposes. The style of architecture and construction methods