The city is located in the extreme north-west of Alera, bordered by the sea on the west and the Shieldwall on the North. Along with Phrygia on the far east, the Legions and Citizenry of Antillus maintain and man the Shieldwall, the massive bastion between the Aleran people and the Icemen Tribes of the North. Its colours are Sky-Blue on Deep Blue. In Cursor's Fury, Tavi states that "Max had once Remarked that the city colours had been chosen based on what shade the skin of one's . . . Well, parts, assumed when exposed to the weather in winter and autumn, respectively."
The Legions protecting the city and manning the Shieldwall are the First, Second and Third Antillan. These legions are almost unceasingly occupied with the constant assaults of the Ice Men.