Religious building. Can only be built in cities following a religion with the Mosques belief. Can only be purchased with Faith.
Note that you can only purchase a Mosque in one of your own cities in which your faith is the majority (i.e. it has your religious symbol to the right of its name).
The mosque serves as the traditional place of worship for the followers of Islam. The largest mosque in the world, the Masjid al-Haram was built in the city of Mecca, in Saudi Arabia, around 638 AD. Also known as the Grand Mosque, the Masjid al-Haram encompasses the holy site of the Kaaba, the most sacred of all locations in the Islamic religion.