Church of Saint Hippolytus, Baroque church in Znojmo, Czech Republic.

The Church of Saint Hippolytus stands in Znojmo's Hradiště quarter on the foundations of a rotunda; the present building is late Romanesque in origin and received its baroque-classicist form in the 18th century. Its ceiling carries a fresco of the Finding of the Holy Cross by F. A. Maulbertsch.

A rotunda with a single apse and a surrounding burial ground stood here, and in 2021 the Archaia survey found a circular structure 13.5 m across two metres below the floor, dated to the mid-11th century. The late Romanesque church built on the site was donated in 1240 by King Wenceslas I to the Knights of the Cross with the Red Star, who set up a monastery and provostship. After the Thirty Years' War the church was largely rebuilt, taking its baroque-classicist form in the 18th century.

The church is dedicated to Saint Hippolytus, a Roman martyr, a rare dedication in the Czech lands. The Knights of the Cross with the Red Star, who received the church in 1240, established a monastery and provostship here, and their red-star emblem can be seen on the church. The ceiling fresco of the Finding of the Holy Cross by F. A. Maulbertsch is a focal point of the interior.

The church stands in the Hradiště quarter on the site above the Dyje valley, a steep walk up from Znojmo's old town. The rotunda foundations found in 2021 lie two metres below the present floor, behind the presbytery wall. The building is a protected cultural monument, so access follows its use as a parish church.

The building has been designated as a protected cultural monument by the Ministry of Culture as part of the nation's heritage preservation efforts. This official status ensures ongoing care and attention to maintaining its historical character.