Walls, towers and gates Mura Pisane e Torri The Pisan Walls together with the Towers surround the city of Iglesias at the historic center for a perimeter equal to 1600 meters. The Walls were particularly massive and typically medieval. They were interspersed with twenty-three towers and could only be overcome through four doors. Beyond the Walls, four other neighborhoods were kept called Castello, Fontana, Santa Chiara and Mezzo.