Decorated in the so-called Naryshkin style, this beautiful 18th Century cathedral was built to commemorate Peter the Great's visit to the city in 1722. Featuring a vibrant and distinctive exterior decoration - the roofs are covered in bright blue and white tiling while the peachy walls are decorated with bright baroque floral patterns - it's a rare example of the Russian baroque movement. The lower chapel based in the tower was used in the winter (it is smaller and has no windows). The upper part of the church (reached by climbing the steep stone staircase) has tall ceilings and unusually for an Orthodox church - windows which let in a special ethereal light effect at certain times of day. The highlight of the cathedral is its huge iconostasis covered in precious metals and stones and the view over the town from the top of the church steps.