Rotunda of the Assumption of the Virgin Mary, Romanesque rotunda in Plaveč, Czech Republic.

The Rotunda of the Assumption of the Virgin Mary is a Romanesque chapel with a circular plan, standing in the garden of Plaveč Castle in Plaveč. It was first mentioned in 1234, though some sources suggest a 12th-century origin. A sandstone lantern with a bell tower holds a bell dated 1487. On the roof sits a stone head with four faces, each looking to a different cardinal direction.

The rotunda was built in the early 13th century and first mentioned in 1234, though some sources suggest a 12th-century origin. It stood by a former Gothic fortress on the Jevišovka River. In the 15th century it gained a Gothic vestibule and oratory, and in 1487 a bell of that year was hung in the sandstone lantern. In 1868 the estate owner Josef Widmann extended it with a family tomb, used until 1945.

The rotunda is a filial church of the Únanov Roman Catholic parish and still serves the local community. Its name refers to the Assumption of the Virgin Mary. The sandstone lantern with a bell tower holds a bell cast in 1487, the year it was installed.

The rotunda stands in the garden of Plaveč Castle in the village centre, near the Jevišovka River. It is a branch church of the Únanov Roman Catholic parish and is protected as part of the castle complex, a national cultural monument. As a small chapel, it is not permanently staffed; visits depend on the parish or castle opening.

At the top of the rotunda sits a stone head with four abstract faces, each turned to a different cardinal direction. It is compared to pre-Christian Slavic idols from Wolin and Zbruch and to descriptions of the lost Svantovít idol on Rügen; it may have been built into the chapel as material during Christianisation.