The Church of St. Nicholas the Wonderworker, characteristic of provincial architecture from the mid-18th century, combines traditional forms of 17th-century architecture with elements of the Naryshkin style. Of all the buildings in the complex, it suffered the most: only the refectory survived. Originally, the building measured 50, 65, and 26 arshins in height, length, and width, respectively. The main volume was a tall two-light cube with windows located along three axes, topped with two tiers of kokoshniks. The gently sloping four-pitched roof was crowned with a five-domed structure featuring unusual two-tiered domes. The elongated five-sided apse was slightly narrower than the church but matched the refectory in height. The windows of the apse and the southern facade of the refectory were adorned with frames featuring half-columns and large broken pediments, while the windows of the cube had semi-circular architraves. Unlike other parts of the building, the cornice of the apse was decorated with a large runner and a ledge. According to the 1887 metrics, the vaults of the main volume rested on two pillars. The altar, divided into two parts, had a storage room on the left side. The seven-tiered wooden iconostasis was distinguished by its ordered decor and petal carving. The interiors of the church and the facades were painted in the second half of the 19th century.

The existing rectangular volume of the refectory, elongated along the longitudinal axis, is covered with a gable roof with a hip on the western side. The facade decor includes wide pilasters at the corners and side walls, a roll above the plinth, and a high cornice with a belt of three rows of sawtooth, limited by rolls. On the western half of the asymmetrical southern facade, two pilasters have been preserved. In the middle part of the wall, the original openings have been lost due to the creation of fire department gates. On the western flank, a window with a triangular top and side columns of the frame has partially survived; on the eastern side, a bricked-up window with remnants of framing: a profiled archivolt and columns with capitals, connected by a cornice. The western facade, divided by a cornice into three steps, wraps around the side facades to the first window. In the center, the remains of the former entrance have been preserved: an arched archivolt with eyelashes, now converted into a window and door. Above the archivolt is a kiot with a similar finish, embedded in the cornice.

The new walls have almost completely altered the layout of the interior; four pillars in the center of the volume and arches between them and the longitudinal walls have been preserved, as well as transversely oriented vaults: a trough vault, the middle one between pairs of supports, and a closed vault with formwork above the openings in the western part of the refectory. In the eastern wall, the closures of three closely spaced arched openings are visible: a large middle one and lowered side ones, which led into the main room of the church. Until recently, the floors from the late 19th century made of ceramic tiles were preserved.