The Jame mosque is the largest and most mysterious mosque in the Islamic world. Construction of this mosque started in 771 AD and continued until the end of the 20th century. The mosque is built in the four-iwan architectural style, with four gates facing each other along a large inner court. Inside the mosque there are impressive brick wall structures. Of these the hypostyle hall is very interesting and has brick vaults built in different shapes and patterns. The Grand Bazaar of Isfahan clies near the southeast wing of the mosque.