The western part of the church was separated from the naos, forming a narthex, flanked by a baptistery on the north and a projecting tower on the south.

Monomakh's architects apparently wished to emphasize verticality of the church, a basically Gothic formula which would be fully developed in Smolensk and Polotsk.

At least three Monomachids were buried underneath the baptistery: George I of Kiev (the founder of Moscow), his son Gleb and his daughter Eufemia.

Incorporating the western wall of Monomakh's structure, Mohyla's church is smaller and differs considerably from its predecessor: there are five towers arranged on a four-petaled plan and surrounded by five massive pear-shaped domes.

At the same time, a two-tier belltower was constructed to Andriy Melenskyi's provincial Neoclassical design which is out of keeping with the rest of the church.

In the early 1970s, a fragment of the 12th-century fresco Miraculous Fishing, depicting Christ walking on water towards a boat, was uncovered in the church.

In 2001, the Getty Institute for Architectural Conservation awarded a grant for a project to prepare the restoration of the Church of the Savior on Berestove to help preserve it as a landmark of world significance.

[1] In 2002–2003, as part of the Getty Foundation's grant program, scientific and restoration research was conducted at the church to develop a project for the conservation and museumification of the monument and to carry out urgent work.

[3] A scientific, technological, engineering, and design survey of the facades, roof and floor structures, and paintings in the church's interior was carried out.

In 2003–2004, about ten pits were laid inside the church to determine the technical condition of the foundations and the nature of their restoration, which was carried out during the 1914 excavations under the direction of Petro Pokryshkin.