The bell tower of the Assumption Cathedral is part of the architectural ensemble of the Rostov Kremlin. It is located next to the Assumption Cathedral and stretches from north to south. Although more than a century separates their construction, the cathedral and the bell tower harmoniously complement each other. The facades of the bell tower are adorned with vertical flat projections and three horizontal belts. The lower floors house the Church of the Entrance of the Lord in Jerusalem and utility rooms. The upper floor features an open platform with a four-bay arcade, each bay fenced with an ornate metal grille and topped with a keystone arch. Above each bay, a dome with a cross is placed on a round drum. A steep, narrow internal staircase with small windows on the facade leads to the upper floor. The voids from the bays with bells to the ground make the building an excellent resonator, and its proximity to Lake Nero enhances the acoustic effect. The bell tower was built in two stages, starting in 1682, when the main three-bay structure was erected and two large bells, the Polyeliy and the Swan, were cast. Initially, the chord of the bells was minor, which did not satisfy the Rostov metropolitan. Jonah Sysoevich invited master Flor Terentyev to transition the bell tower to a major key. In 1688, Terentyev cast the Sysoy bell, which required a separate bell tower in the form of a fourth bay. The three bells formed a C major triad, and construction was completed in 1689 when 13 bells were installed in a single row. In the second half of the 19th century, two more bells were added, and since then, the bell tower has housed 15 bells. The Rostov bells have faced threats of destruction multiple times. During the war with Sweden, Peter I ordered the bells to be confiscated for military needs, but the Rostov churches avoided this fate. In the 20th century, with the advent of Soviet power, the threat of removing the bells for industrial purposes reemerged, but they were preserved in 1919. Since 1928, ringing ceased, and the cathedral was closed in 1930. The bells were used in 1932 for the filming of 'Peter I' and in 1963 for sound recording by the Gorky Film Studio, as well as for the film 'War and Peace.' Since 1966, the ringing has gradually been revived. From 2010 to 2012, the bell tower underwent restoration, which included strengthening the foundations, restoring the roof structures, brickwork, windows, and doors, as well as finishing works.