Church of Saint Mary Magdalene, Roman Catholic parish church in Karlovy Vary, Czech Republic

Church of Saint Mary Magdalene is a baroque building in Karlovy Vary with twin towers and a central dome that shape the city's profile. Inside, an elaborate 18th-century altar and religious sculptures fill the space, with tall windows allowing light to illuminate the interior.

The baroque church was built between 1732 and 1736 on the site of a Gothic predecessor first documented in 1485, which had become too small and was threatened with collapse. Grand master František Matěj Böhm brought architect Kilián Ignác Dientzenhofer to Karlovy Vary, and Emperor Charles VI granted 1,000 ducats and the building permit in 1732. The foundation stone was laid on 27 April 1733; master builder Thomas Hansl supervised the work, which was hampered by hot springs in the foundations.

The parish has been run by the Knights of the Cross with the Red Star since its foundation and again since 1990. In 1881 the Karlsbad entrepreneur Heinrich Mattoni commissioned two stained-glass windows in Innsbruck, showing the Wedding at Cana and the Last Supper, set in the large windows above the galleries.

The church stands on the spa colonnade by the Teplá river, its concave façade facing the hot spring. Excursions include a look at the underground spaces beneath the nave, where the former parish cemetery was moved after 1784. The interior is entered through the elliptical vestibule under the twin towers.

During the excavation of the foundations, workers struck hot springs; the trenches filled with water and stalactites formed, and the rising steam threatened to suffocate the masons. The cemetery around the church was abolished in 1784 and the remains moved partly to St. Andrew's church and partly to a crypt and ossuary niche beneath the floor.