Co-Cathedral of Saint Alexander is a Catholic cathedral in Kyiv. It belongs to the Kyiv-Zhytomyr Diocese of the Roman Catholic Church in Ukraine. Built in 1842 in the classical style. Cross-shaped (square) in plan, with a high main dome and two towers, a portico at the entrance. It is one of the oldest Catholic sacred places in Kyiv. Inside, a rich interior and six side altars have been preserved. Despite facing challenges during the Soviet period, St. Alexander's Church was restored in the 1990s and has since resumed its function as a place of worship. It remains a significant spiritual center for Catholics in Kyiv and Ukraine.