Mausoleum of Struggle and Martyrdom (Polish: Mauzoleum Walki i Męczeństwa) is a museum in Warsaw, Poland.

The museum presents the conditions in which Polish patriots and resistance fighters were jailed by Nazi Germany during World War II.

After the outbreak of World War II, the Nazis took over the building and turned it into the headquarters of the Sicherheitspolizei and Sicherheitsdienst police forces.

The extent of these killings were tremendous, human ashes found in the basement after the war weighed 5,578.5 kg (12,298 lb).

[2] After the war the people of Warsaw treated the place as a cemetery, often bringing flowers and lighting candles.

[4] In July 1946 the Polish government decided to designate the site as a place of martyrdom, a testament to the suffering and heroism of the Poles.