In 1841, during a major reconstruction of the Annunciation Cathedral, another shrine was discovered, a small cell of Saint Guriy. Its dimensions were 2.89 m in width, 2.18 m in length, and 1.78 m in height, and the walls were made of the same stone and in the same technique as the main structure of the cathedral. This indicates that the archpastor arranged the cell during the construction of the church. It was located under the original Boris and Gleb chapel, which was rebuilt, incorporating the old part into the main volume of the building in the southern part of the church. The archpastor used this place for solitary prayer, as mentioned in his Life: "The standing in prayer was constant, bringing to God in the cell near Boris and Gleb." It is also said that he lived piously, helped the poor, defended the needy, widows, and orphans, and prayed to God at night. On the eastern wall of the cell, a 16th-century fresco depicting the Uncreated Savior has been preserved, presumably created by Saint Guriy himself. It is no surprise that people were drawn to the open cell of the saint, perceiving it as a true shrine. The room was beautified: the walls were plastered, an icon case was made, and a door was opened on the western side.

In 1906, during another round of repairs in the cathedral, a chapel was built above the cell, which has survived to this day. During the Soviet era, the chapel was used as a utility room for the janitor, and the door to Saint Guriy's cell was bricked up, which helped preserve the fresco of the Uncreated Savior in an undamaged state. In our time, the door has been restored, freeing the shrine "from under the rubble."