The Church of the Holy Trinity in Stakliškės is a historical late Baroque architectural sanctuary located in the very center of the town of Stakliškės. This twin-towered, cruciform building, completed in 1776, has become an important symbol of the town. The church's history dates back to the 16th century, with the first sanctuary built before 1586, which was later burned down by Russian soldiers. The new building was initiated by Joseph Boufal, the elder of Stakliškės.
The church is a single-nave structure with a low dome, and its interior preserves numerous valuable artworks, including Baroque organs, a pulpit, and 19th-century paintings. The church's altars, baptismal font, and pulpit are adorned with the Boufal family coat of arms, and one
of the three bells dates back to 1631. Next to the church, a brick chapel was built in the 18th century, currently housing a sculpture commemorating the tenth anniversary of Lithuania's independence.
The church's architectural structure is characteristic of the late Baroque style: a cruciform plan with a single long nave and transept, with the intersection marked by a spherical vault. The interior space of the sanctuary is enhanced by a large two-story altar featuring statues of St. Joseph and the Blessed Virgin Mary, as well as four other altars located in the transept chapels. A number of valuable 17th–18th century paintings and sculptures have survived to this day, including the painting "The Holy Trinity" and the sculpture "The Crucified."