The Trinity Church is an architectural monument of the 18th century in the late Baroque style. It was built in 1761-1779 on the site of a wooden church by the architect August Moshinsky, who studied in Germany, on the model of the church at the royal palace in Dresden. The building has a rich exterior decor: the facade is generously decorated with baroque elements with lavish details, stone sculptures and vases are installed in the wall niches. In Soviet times, the premises were used for household purposes, so the original interior murals have not been preserved. The main altar with the image of the Holy Trinity and four side altars are installed in the temple. Altars of 1779, wooden, covered with marble.
The Church of the Holy Trinity is in the use of the Catholic community of Mykulynets. Next to the temple there is an old cemetery with the graves of members of the count family Rey. Opposite the church is the Reev-Pototsky Palace, connected to the church by a maple alley.