Extremely well-preserved rotunda.
The Church of the Nativity of the Virgin Mary in Holubice is a Romanesque rotunda founded in 1224-26. Later it was extended by a Gothic tower in the shape of a prism. Inside, we can find well-preserved elements such as door jambs, ribbed vaults and window tracery. Gothic wall paintings were unveiled in the 20th century.
The rotunda is locked, but an elderly lady from the house directly in front of the tourist stamp store will lend you the keys.
Photo source: Ondřej Pospíšil (CC BY-SA 2.0)