The domed building in the late classicism style originally had five domes. The composition is based on a cubic two-light volume topped with a large light drum and a hemispherical dome.

Only the lower parts of the blind cylindrical drums remain from the four domes located above the corners of the cube. The rectangular altar matches the width of the elongated refectory, to which the lower tier of the bell tower adjoins from the west. The main decoration of the facades is the Tuscan order with meticulously crafted details. The altar projection is decorated with a portico featuring four pilasters and a pediment; a similar portico is repeated on the side of the cube, where originally there were heavily protruding four-column porticos. The walls with a frieze at two-thirds of the height are topped with an entablature featuring flat modillions and stucco rosettes in the cornice. At the lower part of the walls, there are large rectangular openings in simple frames; at the upper part, above the frieze, are the windows of the second light and niches. The drum of the dome has eight arched windows with a ledge along the edge and flat rectangular niches between them, divided by a frieze into two parts. The lower tier of the bell tower is distinguished on the side facades by two pairs of large pilasters and a powerful portico in the anta on the west facade with two pairs of columns.