Oscar Niemeyer's international fair in Tripoli, Lebanon, is one the largest ensembles built by the Brazilan architect. It comprises 15 buildings on a site of 10,000 hectares. Construction started in 1963, but building work stopped at the outbreak of the Lebanese civil war in 1975 and never resumed. The buildings - although occasionally used for events - are in ruin and have been added to a list of 100 most endangered sites monitored by World Monuments Fund.