The profuse Early Baroque decoration inside from the beginning of the 17th century and magnificent painting on the main altar by Palma il Giovane depicting "Virgin and Child with St. John the Baptist and St. Stanisław" were destroyed in German bombing of the church on August 17, 1944. The remains of the church were blown up by the Germans in November 1944. One wall that somehow managed to survive was all that was left of the six-hundred-year-old edifice. This devastation of a Polish national monument was a part of the Planned destruction of Warsaw, which had officially begun after the collapse of the Warsaw Uprising.