Holy Trinity Church, Baroque church in Klášterec nad Ohří, Czech Republic.

Holy Trinity Church is a single-nave early baroque building consecrated in 1670, with a polygonal presbytery, a northern sacristy and an oratory reserved for the nobility. Its barrel vaults carry lunettes and rich ornament, and the main facade bears the coat of arms of Count Michael Thun and his wife. A brick bell tower was added to the north side around 1850.

The building was constructed in the second half of the 17th century following designs by architect Carlo Lurago. The church was linked across generations with the Thun family, whose members were entombed in a vault beneath the structure.

The church hosts regular services and also concerts and other cultural events. During Advent it displays nativity scenes made by children from Klášterec kindergartens, and grammar-school pupils perform plays there for the Kometa celebration of Epiphany.

The building sits in the center of Klášterec nad Ohří and is easy to reach on foot. Check with local sources or information offices about current visiting conditions and times for access.

The building holds religious artworks and fixtures from its original construction period that can still be viewed today. These objects offer direct insight into the artistic ideas and craftsmanship of the baroque era.