Centre William Rappard is the first building in Geneva designed to house an international organization. It was built between 1923 and 1926 to house the International Labour Office (ILO). In 1975 the ILO moved to Grand Saconnex and in 1977 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 Centre William Rappard. In 2008-2013, the building was completely renovated and an extension was constructed to make available more office space and meeting rooms. This historic building was enriched by artistic decorations and contains works of art presented by governments and institutions during almost a century at the heart of international relations.