St. Nicholas Cathedral - a temple complex of the Russian Orthodox Church, located in the center of Kazan Bauman street. This city landmark and monument of religious architecture. Since 1946, the cathedral is functioning as a cathedral. The cathedral is an architectural complex of office buildings, communicating Intercession and Nicholas Nizskoy churches, bell towers and a chapel.

Nicholas Nizskaya church was called so to distinguish it from other Kazan church dedicated to Saint Nicholas. For example, the Church of St. Nicholas from the living room, which was located nearby.

Nizskaya Nicholas Church (Church of St. Nicholas) is a brick stucco building. The facades of the church are decorated in eclectic style of the late 19th century. The building church classic construction: Besstolpny, one chapter odnoapsidny. The main entrance is on the west facade located at the Bauman Street. Login decorated with niches on both sides of the rectangular shape. The second input is made from the churchyard. The building has two levels, which are adorned with flat, profiled blades. In the second floor there are rectangular windows with frames of complex forms, with elements polukolonok and ends pediments. Frieze is decorated with stucco decoration geometric shape. Decor elements alternate with triglyphs, located above the shoulder blades. The building is completed figure attic and cupola on a drum having a decorative shape.

Intercession Church - a monument of architecture, in the style of Russian baroque. It was built in the late 17th - early 18th centuries. Trehapsidny temple of bricks was once plastered. Pyatistolpny temple, domed, with five onion domes, the decision in the Byzantine style. The temple is almost cubic volume, shares flat drooping blades. The volume ends with bins semicircular shape decorated curb. Temple two rows of windows. Window openings have semicircular shape and framed by magnificent Baroque architraves, pediments with keeled. Large and small light drums decorated with filigree ornament belts.

Bell tower height dominates all the buildings of the complex. It was built in the early 18th century in the style of Russian baroque. Five-tiered bell tower, with its richly decorated walls tiers completed octagonal drum, with bulbous head. Glaucus is coated with ceramic tiles scaly green. Octagonal belfry decrease the volume upwards and decorated with carvings and brick semi-columns.