The Church of the Holy Trinity with the Trinitarian Monastery is the main historical landmark of Berestechko. The majestic masonry church of the 18th century stands in the town center, near the field of the Battle of Berestechko, and even in its ruined state impresses with its scale.
History
At the end of the 17th century, Berestechko was owned by the Galician castellan Tomasz Karczewski. On January 6, 1691, he registered a fund in Lviv for the Roman Catholic monastery in Berestechko. On July 24, 1711, the cornerstones of the masonry Church of the Holy Trinity and the Trinitarian monastery — an order that redeemed Christians from captivity — were laid. The construction was completed thanks to the fund of Jan Jakub Zamoyski in 1765.

In the 1780s, sculptor Franciszek Oleński received a large commission for a sculpture ensemble for the church. The sabre of Prince Jeremiasz Wiśniowiecki was kept in the church, which was stolen by the Bolsheviks in 1920.
Architecture
The church is masonry, three-nave, with a cross-shaped plan; it once had eight altars. A bell tower stands nearby.

Condition
Currently, the building is in an emergency state: due to the damaged roof, precipitation enters inside, so visitor access is limited. It is better to view the church from the outside.
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Nearby
Berestechko — about the town, Field of the Battle of Berestechko — Cossack Graves nearby.