After the invasion of Poland, Poznań was annexed by Germany and the University was closed by the Nazis in 1939. It was reopened as a German university in 1941, which operated until 1944. Staff and students of the Polish university, some of them expelled by Germans to Warsaw, opened an underground Polish University of the Western Lands (Polish: "Uniwersytet Ziem Zachodnich"), whose classes met in private apartments (see Education in Poland during World War II). Many of the professors and staff were imprisoned and executed in Fort VII in Poznań, including professor Stanisław Pawłowski (rector in the years 1932-33). The Polish university reopened, in much smaller form, after the end of World War II. In 1950, the Medical Faculty, including the Dentistry section and the Faculty of Pharmacy, were split off to form a separate institution, now the Poznań University of Medical Sciences. In 1955 the University of Poznań adopted a new patron, the 19th-century Polish Romantic poet Adam Mickiewicz, and changed to its current name.