The belfry of the Ryazan Kremlin is an example of the integration of various architectural styles, ranging from early classicism to late Empire. The first tier was built between 1789 and 1797 according to the design of architect S.A. Vorotilov from Kostroma. The second tier appeared in 1816 thanks to architect I.F. Russko, while the third and fourth tiers with a huge spire were erected between 1835 and 1840 according to the design of Ryazan provincial architect N.I. Voronikhin, a nephew of the famous A.N. Voronikhin, who used the project of K.A. Ton. The height of the belfry is 83.2 meters. It is known that changes were made to Vorotilov's project during the construction of the first tier, which weakened its picturesque features. The second tier was executed in the spirit of early classicism, while the third tier demonstrates features of late Empire. The fourth tier and spire were built by N.I. Voronikhin on an iron frame using sheet iron instead of stone.

The Ryazan belfry is a unique architectural work. Despite the involvement of different architects at different times, the style of the belfry remains cohesive. It is remarkable that such a large-scale work of ordered architecture harmonizes with the unadorned architecture of the Assumption Cathedral. The belfry fits well into the silhouette of the cathedral, and the rhythm of its columns resonates with the vertical half-columns that divide the facades of the cathedral. Initially, the belfry was painted yellow, but later it was replaced with brick-red, creating harmony with the cathedral. The return to yellow disrupted this harmony. The belfry is adorned with Corinthian order columns and sculptures of angels with trumpets. Its significance for Ryazan is comparable to that of the Ivan the Great Bell Tower in Moscow or the buildings of A. Zakharov in St. Petersburg. The belfry of the Assumption Cathedral in Ryazan is unique in its purity and severity of style, and there are no similar examples of classicism in other cities of Russia. It is the tallest structure in the Kremlin area, standing 86 meters high with a gilded spire nearly 25 meters tall. It was built in the classical style over more than 50 years, from 1789 to 1840. On the third tier of the belfry, there is an observation deck that offers a magnificent view of the Kremlin, Ryazan, and the surrounding areas. In July 2007, the belfry was transferred to the Ryazan Diocese.