(突尼西亞) 凱路安大清真寺   

The Great Mosque of Kairouan

The first mosques erected in early Muslim time did not have minarets – the believers were called to prayer by the muezzin standing on the mosque roof.
The lowest storey of the minaret in Kairouan is the oldest example of minaret in the entire world, and dates back to 730, more than 100 years after the commence of Islam.