The church of the great martyr Demetrius of Thessalonica, built with funds from the cathedral and consecrated in 1873, was located in the city cemetery and was affiliated with the cathedral. Initially, it was made of stone with a wooden bell tower, which was replaced with a stone one in 1889. In the early 20th century, thanks to donations, two chapels were added: the southern in honor of the first martyr Stephen and the northern in honor of Princess Olga. It is believed that Stephen was the grandson of the church's first builder, Dmitry Yaroslavtsev, and Olga was his wife. Within the church's enclosure lies the grave of Stephen and Olga.

The church has a ship-like shape, with attached chapels. The light drum is topped with a dome, surrounded by four small domes. To the west stands an octagonal bell tower with a dome and a cross. The design of the second tier of the bell tower features rectangular pilasters and niches. The external decor of the church is restrained, emphasizing its mournful purpose. The window openings are framed with strict moldings, and the cornices are adorned with a belt of pilasters. The church combines classical style with elements of baroque. Initially, services were conducted alternately by the cathedral clergy on Sundays, holidays, and Saturdays, later daily.

During the Soviet era, the clergy and parishioners remained loyal to Patriarch Tikhon and Metropolitan Sergius, inviting bishops of the old church, such as Bishop Nikolai of Amasia, to services. During this period, the church became independent from the cathedral, the center of renovation in Troitsk. Among the priests was Viktor Fedorovich Petropavlovsky, who served in the church until its closure, after which he moved to the Alexander Nevsky Church. Another priest was Alexander Alexandrovich Nikolsky, who served until 1930.

On May 11, 1930, the church was liquidated, and its property was transferred to the State Fund. The acceptance act noted the richness of the church's decor, which was explained by the transfer of utensils from closed churches. After its closure, the building was used as a warehouse for a butter factory.

During the Great Patriotic War, the attitude towards the Orthodox Church changed, and by the decree of the Council for the Affairs of the Russian Orthodox Church on May 20, 1947, the church was returned to the believers. Since then, the Church of St. Demetrius has not been closed and has long remained the only functioning church in the area.