The boundary wall of Augusta Praetoria formed a rectangle measuring 727m by 574 and was built from an interior layer of river stones and an external layer of blocks of travertine.
Sections in which it is still clearly visible: via Hotel des Monnaies, via Carducci, via Carrel (near the bus station), via Monte Solarolo, via Abbé Chanoux. In via Festaz, especially at the junction with via Vevey, you can see the open gaps in the walls for the passage of modern city streets.