Northern-Europe's biggest mosque, near the Peter and Paul Fortress, is a place of worship for up to 5,000 Muslims. Although officially 300,000 followers of the prophet Mohammed live in St. Petersburg, the mosque is almost never full. It was built in 1913 and is the northernmost mosque in the world. Last year the mosaics and the two 49m high minarets were renovated to great beauty. During Soviet times medicines were stored here.