The Majdanek trials were a series of consecutive war-crime trials held in Poland and in Germany during and after World War II, constituting the overall longest Nazi war crimes trial in history spanning over 30 years. The first judicial trial of Majdanek extermination camp officials took place from November 27, 1944, to December 2, 1944, in Lublin, Poland. The last one, held at the District Court of Düsseldorf began on November 26, 1975, and concluded on June 30, 1981. It was West Germany's longest and most expensive trial, lasting 474 sessions.