|Rome and its provinces; Eljem museum Tunisia, House of Africa|
One century later, Caracalla had granted the Roman citizenship to all free inhabitants of the Roman empire. This law is known as the Antonin Constitution. The purpose was to simplify the tax structure and the administration.
The mosaic above shows the unity of Rome. Minerva, the goddess of war in the middle symbolise Rome surrounded by its provinces. Africa, Anatolia, Egypt, Spain and Gaul. Africa wearing an elephant ear, Spain with olive tree branch, Diana represents Sicily and Isis represents Egypt.