sentences:  During her time in office, United Nations Volunteers (UNV) moved its headquarters to Bonn in 1999.Internationally, Dieckmann served as executive president of the Council of European Municipalities and Regions (CEMR) between 1999 and 2003.From 2005 she chaired the World Mayors Council on Climate Change (WMCCC); the office was established after the Kyoto Protocol came into force.