The Temple of All Religions, in the Aksay suburb on the western edge of Kazan, is one of the country's most peculiar buildings — an unfinished architectural mash-up combining a mosque dome, a Russian Orthodox cupola, a Catholic bell tower, a Buddhist pagoda, a synagogue, and several other religious motifs into a single structure. The intent was to symbolise the equality of all faiths under one roof.
Inside, the upper floors host paintings and sculptures by the founder; the building is not a functioning place of worship. It is a 20-minute drive west from the centre or accessible on a city bus from Kazan station. Open daily; modest entry fee. Worth visiting more for the strange spectacle than for any conventional sightseeing reason.