St. Sophia Cathedral was built between 1030 and 1060 as a replica of the St. Sophia Cathedrals of Novgorod and Kyiv. The church was closed during the Great Northern War (1700-1721) and fell into ruins afterwards. It was rebuilt in the 1740s in late Baroque style according to the plans of the German-Baltic architect Johann Christoph Glaubitz. The Soviets closed the cathedral in 1949 and used it as an archive warehouse. It was restored in 1967 to become a museum of atheism. Today the cathedral is used as a concert hall.
St. Paraskieva Church is an Orthodox church built in 1841-44 on the site of an old church erected at the time of the foundation of the town at the end of the 16th century. The church consists of a low rectangular porch under a gabled roof, a higher nave with a one-storey quadrangular bell tower, a rectangular prayer hall under a gabled roof.
The Orthodox Church of St. Nicholas was built in 1914. The church consists of a three-tiered bell tower, a low nave, a square prayer hall and a pentagonal apse with a sacristy.