The palace is in the form of a rectangular block with a compact and austere volume, relieved only by the rhythmically and discreetly inserted rooms in the elevation. The ground floor is characterised by the presence of a large porticoed corridor, open on the short sides and with three access arches, with double ogival arches, on the main façade. The larger central archway corresponds to the arch framing the entrance to the fountain room. A curious detail suggests an attentive view: the painting in the entrance archway, where various small figures animate the space. These are called the ‘The Devils of the Zisa’ in popular tradition. 
The legend, born around these images, tells the story of the impossibility of determining their precise number, which varies every time they are looked at and counted.
