The Centre William Rappard at Rue de Lausanne 154, Geneva, Switzerland, was built between 1923 and 1926 to house the International Labour Office (ILO). It was the first building in Geneva designed to house an international organization. In 1975 the ILO moved to Grand Saconnex and in 1977 the Centre William Rappard was occupied by the secretariat of the General Agreement on Tariffs and Trade (GATT), the UN High Commissioner for Refugees, and the library of the Graduate Institute of International and Development Studies. By 1995, the World Trade Organization (WTO) replaced the GATT and became the main occupant of the Centre William Rappard.