Cathedral of the Polish Army Dedicated to Our Lady of the Queen of Poland is located in the Old Town, the historic district of Warsaw. In 1642, on this site, by order of King Vladislav IV, a small wooden church of Our Lady of Victory was built for the Order of PRs. In 1651, the relics of Saints Primus and Felician were brought to the church, brought from Rome for Vladislav IV by one of the representatives of the Ossolinsky clan. This wooden church burned down during the Swedish invasion of the Commonwealth in 1656. Under King Jan Casimir, the construction of a new stone temple was begun. The building was erected in the Baroque style by the architect Jakub Fontan. The construction was completed in 1682, and on July 17, 1701, the church in honor of Our Lady of Conquest and the saints of Primus and Felician was consecrated by the Poznan bishop Mikolai of Shviantsy. The altars were decorated by sculptors Shimon Chekhovich and Jan Jerzy Plerš, the icon of the Gracious Mother of God, the patroness of Warsaw, who was brought from Rome, was placed in the church. After the defeat of the January Uprising of 1834, in which priests of the Order of PRs took an active part, the tsarist government took the church away from PRs and transferred it to the Russian Orthodox Church. In 1835-1837 the church was rebuilt and adapted to the Orthodox liturgy, the towers were crowned with onion domes, hanging domes were installed, all elements of the Baroque style were removed from the decor. The PR Church has been renamed the Holy Trinity Cathedral. In 1919, the Polish authorities returned the church of the Roman Catholic Church, by decision of Cardinal Alexander Kakovsky, he was transferred to the Department of the Polish Army. On February 5, 1919, Pope Benedict XV appointed Bishop Stanislaw Gall as vicar of the Polish Army. In 1923-1927, the church was reconstructed under the guidance of Professor Oscar Sosnowski, as a result of which the baroque decoration was returned to the church. In 1944, during the Warsaw Uprising, the church building was badly damaged, its restoration was carried out in 1946-1960 under the leadership of architect Leon Mark Susin. On January 21, 1991, the Field Ordinate was restored by the papal bull, and the temple received the status of the Cathedral of the Polish Army Dedicated to Our Lady of the Queen of Poland. To the right of the temple, on the initiative of the field bishop of the Polish Army, division general Slavoj Leszek Gludz, the Katyn chapel was built in memory of 21,857 Polish citizens who were victims of Katyn. The central element of the chapel is a wall made of Carrara marble, which depicts a Madonna in a halo made of buttons from uniforms and overcoats, found at the opening of burials in Katyn, Medny and Kharkov. On the side walls are written the names of about 15,000 Polish officers and military personnel who died in Katyn, Medny and Kharkov, as well as tablets with the names of 3,435 Polish citizens from the Ukrainian Katyn list, whose burial sites were never found. In the chapel of Our Lady of Ostrobramskoy, Bishop Tadeusz Plosky and his secretary, father Jan Osinsky, were killed in a plane crash near Smolensk on April 10, 2010. In the cave of the temple is the Museum of the Field Ordinariat, dedicated to the history of the military clergy of Poland (www.ordynariat.muzeumwarszawy.pl/muzeum/o-muzeum/).