During the Warsaw Uprising in 1944, four hospitals operated in the Wola district of Warsaw.
The most dramatic moment in the wartime history of Wola's hospitals was the mass slaughter of district residents carried out in the first days of the uprising by Schutzstaffel (SS) units and Ordnungspolizei. On "Black Saturday," 5 August 1944, the Germans massacred the staff and patients of the Wola Hospital and the St. Lazarus Hospital. The next day, the patients of the Karol and Maria Children's Hospital also fell victim to the massacre. Thanks to the brave stance of the staff, the St. Stanislaus Infectious Disease Hospital escaped destruction. A few days later, the Wola Hospital also managed to resume its activities. The staff of both facilities provided aid to the Polish civilian population expelled from Warsaw by the Germans until the end of October 1944.