 Kajaani Church was built in 1896 in the Neo-Gothic style by architect Jac Ahrenberg. It replaced an earlier church on the spot which was originally built in 1656 and destroyed by the Russians in 1716 at the time when Kajaani castle was destroyed. The second church was built 1734-35 which served the parish for 160 years until replaced with Ahrenberg's new church. The church, built from wood, has three naves and features a delicate, slender bell tower. It is decorated with English Gothic style carvings. Kajaani Orthodox Church (Kajaanin ortodoksinen seurakunta), which has a regional membership of about 1880 members is centred at Christ Church of the Transfiguration in Kajaani. The church was completed in 1959 to designs by Ilmari Ahonen. It contains murals painted by Petros Sasaki and Alkiviadis Kepolas. In the suburb of Paltaniemi is a church, originally built in 1599, and considered to be the regional centre for the Lutheran Church.
