The Palermo Cathedral, like that of Cefalù, was designed as an ecclesia munita. For this reason, a system of passages was created, inside the walls and in the upper parts, as patrol walkways, protected by elegant battlements placed at the top of the building. In the area of the Presbytery, these passages were also opened up to the interior of the church, with a colonnaded loggia, built of terracotta bricks, with lily capitals, covered with red and green painted plaster.
