Coordinates: 46°47′45.47″N 23°36′57.86″E / 46.7959639°N 23.6160722°E The Kolozsvár Ghetto was one of the lesser-known Jewish ghettos of the World War II era. The ghetto was located in the city of Kolozsvár, Kingdom of Hungary (now Cluj-Napoca, Romania). Between the signing of the Treaty of Trianon in 1920 and the Second Vienna Award in 1940, Cluj was a part of Romania. In 1947, the Paris Peace Treaties gave Northern Transylvania (including Cluj) to Romania.
On 3 May 1944, the ghettoization of Kolozsvár Jews began. The ghettoization was completed within a week. This was less than two months after the Germans launched Operation Margarethe, on 19 March. Operation Margarethe was the operation by which the German Army (Wehrmacht) placed Hungary under a puppet government, the Government of National Unity.