Ar'rusafa
In Roman and Byzantine era, the city was known as “Serigiopolis” meaning St. Sarkis City. Rusafa city is situated to the north of the Syrian desert, and to the south-west of Raqqa. It contains a lot of establishments and important buildings as well as the huge wall, churches, basilica, cathedral, palaces, its famous underground water tanks and vaults along the wall of the city.