St. Sergius’s successor Nikon was buried at the southern wall of the Trinity Cathedral. In 1548, the so-called Nikon Chapel was constructed over his tomb. It is a church with one cupola and one apse, without supporting pillar inside. The church is made of bricks. The walls are covered with white stone up to the top of the apse. They are decorated with vertical semi-columns tight up with three rows of beads. Constructing the Chapel close by the Trinity Cathedral, the craftsmen seemed to stress the spiritual contact between the Monastery founder and his disciple and successor.