The world's smallest mosque has been built in the memory of Tatars who were killed during the taking of Kazan by troops of Russian Tsar Ivan the Terrible in 1552. According to Rosbalt, not more than 10 people can worship in the mosque at one time.
The mosque was built in the style of a miniature copy of the Kul Sharif mosque, which was constructed on the territory of the Kazan Kremlin. The miniature octahedral mosque measures 25 square meters. It has one cupola and four 10-meter high minarets. The interior of the mosque covers only ten square meters. The initiator of the construction of the mosque was a 77-year-old WWII veteran. Various organizations and individuals donated money for the construction of the mosque.