The Grand Mosque of Damascus, also known as the Umayyad Mosque (Arabic: جامع بني أمية الكبير, transl. "Ğām' Banī 'Umayyah al-Kabīr"), is one of the largest and oldest mosques in the world.It is in one of the holiest sites in the old city of Damascus. It is also very important because of its architecture.