The Mokotow Prison at 37 Rakowiecka Street in Warsaw, and its dreaded Departments "X", "XI", known as "The Palace of Miracles" (pol. "Pałac Cudów"), was among the most sinister and dreaded houses of detention, torture and executions in Poland. Among hundreds of Polish patriots murdered there, were Cavalry Captain Witold Pilecki, Col. Łukasz Ciepliński , General Emil Fieldorf "Nil", Major Zygmunt Szendzielarz, "Łupaszka"", Major Hieronim Dekutowski, "Zapora", NSZ's Stanisław Kasznica, officers and soldiers of the Wolność i Niezawisłość (Freedom & Independence - WiN), Narodowe Siły Zbrojne / National Armed Forces (NSZ), Narodowe Zjednoczenie Wojskowe (NZW), and countless others who fought against the communism between 1944-1963, and beyond. In this video produced by "Gazeta Polska", Jacek Pawłowicz of the Institute of National Remembrance, IPN, takes us on a rare tour to one of the most hallowed places in Poland: "The Place Where Communists Murdered Polish Heroes."