The temple is situated on the central square of a small Belarusian town, on the place where a wooden church was built in 1587. After nearly a century the building was reconstructed, and in 1865 it was transformed into a church.
St.Nicholas church is a stone, three-nave basilica with three towers. There is a powerful tower-belfry with four levels on the entrance to the church from a side where a central squire of Mir is located. It has a pyramidal broach roof and a square base. Under the apse of the church there is the crypt with 30 tombs.
Rebels were gathering in St. Nicholas church in 1863 to prepare for the future rebellion. This fact mostly determined the fate of the Catholic church. After the defeat of the uprising, the royal government turned the temple into the Orthodox church. During the Great Patriotic War the church was closed. Only nearly half a century later the Catholic church started functioning.
