Cesaraugusta was surrounded by a wall with as many as 120 towers and walls that were up to 7m metres thick in some parts. The exterior is made of alabaster with limestone ashlars, whilst the interior is of extremely hard mortar (opus caementicium, or Roman concrete). Its towers are semicircular, or ultra-semicircular, with a minimum diameter of 8 metres and a maximum of 13 metres on one of those flanking the western gate.

The wall protected a 3 km perimeter and stretched from Echegaray y Caballero, all along the Coso and César Augusto Avenue. The city could be accessed through four gateways; one at la Magdalena, a southern entrance slightly to the east of the Principal Theatre and the western entrance at the end of C/Manifestación. These gates were known in the middle ages as the Angel in the north, Valencia in the east and Toledo in the west. During the Muslim period, the south was accessed through the Cinegia gate, the entrance to the popular Tubo area, which is slightly to the west of the former Roman access.

This area also features a statue of the emperor Augustus, which is a bronze copy of the famous Augusto de Prima Porta which was given to the city by the Italian government in the 40s.

The figure faces three tall lintels and a semi-circular arch that resembles the primitive Toledo gate. The alabaster sides feature the four names of the city: Salduie, Caesaraugusta, Saraqusta and Zaragoza.