Umayyad Mosque Courtyard columns, Damascus Syria
from wikipedia: The Umayyad Mosque, also known as the Great Mosque of Damascus (Arabic: جامع بني أمية الكبير,), located in the old city of Damascus, is one of the largest and oldest mosques in the world. It is considered by some Muslims to be the fourth-holiest place in Islam.
After the Arab conquest of Damascus in 634, the mosque was built on the site of a Christian basilica dedicated to John the Baptist (Yahya). The tomb of Saladin stands in a small garden adjoining the north wall of the mosque.