The Church of the Transfiguration, located under the main church of the Cathedral was constructed to commemorate the Alekseyevsky Convent that had been located on the site of the Cathedral and dislocated to make room for the original Cathedral. This church is designed in the sixteenth century style, since the convent had been established on this site during that period. There are three altars in the church --the Transfiguration in the center and two side chapels in honor of St Alexey, man of God and the Tikhvinskaya Icon of the Mother of God.

Patriarch Alexey consecrated and officially opened the Church of the Transfiguration on August 19, 1996, on the day of the Transfiguration.

Venerated Icons: "Christ not created by hand" painted by Sorokin - this icon miraculously survived from the original Cathedral, an ancient Smolenskaya Icon of the Mother of God and an Icon of Saint Nicholas sent from Bari, Italy, where the relics of Saint Nicholas are located.

Clergy: The Patriarch is Rector of the Cathedral. Father Mikhail Riazantsev is the assistant rector and representative of the Patriarch. In addition, there are two priests - Fathers Nikolai Gostev and Andrei Ovchinikov and two deacons - Fathers Aleksandr Ageikin and Andrei Marushak.

Choirs: the main choir if the Cathedral under the direction of N. Georgievsky, a well-known church conductor and a youth choir under the direction of S. Koltsova, a graduate of the Moscow Theological Academy's School of Choir Directors.

Schedule of Services: Vespers, Matins and the Divine Liturgy are conducted in the main Cathedral on Sundays and feast days. Daily services are conducted in the Church of the Transfiguration on weekdays.

Individual Services: in addition to regular services, the following individual services are available on request: Baptism, Marriage, Panikhidy (services for the deceased) and Molebens (special prayer services for various needs).