View looking east over the excavations of the Lower City. In the foreground the paving of the north-south cardo is visible.
Early in the second century AD the city expanded eastward and boasted an impressive network of streets arranged in a grid, with two colonnaded streets, the cardo and decumanus, at its center. This area included public buildings, shops, residences, and religious structures. Many mosaics were found inside of these structures.