 In 1921, the hotel's owners, the Przeździecki and Czetwertyński families formed the joint stock company, Hotel Europejski Spółka Akcyjna (HESA).The hotel was renamed the Europäisches Hotel by the Germans during the occupation in World War II and used to house Wehrmacht officers exclusively whilst keeping a large portion of the pre-war Polish staff.It was severely damaged after the Warsaw Uprising in December 1944 and January 1945 by the retreating Germans.