Ravensbrück was a Nazi concentration camp exclusively for women from 1939 to 1945, located in northern Germany, 90 km north of Berlin at a site near the village of Ravensbrück. Wikipedia
Inmates: Mostly female political prisoners, 48,500 Polish; 28,000 Soviet Union, 20,000-plus Jews
Liberated by: Soviet Union, 30 April 1945
Number of gas chambers: 1
Operational: May 1939 – April 1945