Palazzo delle Poste, Palermo

The style of the building is typical of the fascist period and falls under the rubric of Italian Rationalism. It covers an area of 5100 m², which is symmetrically structured around two side courtyards. The structure is rendered in reinforced concrete and clad in gray marble from Mount Billiemi.[4] The front colonnade is formed by 10 columns each 30 meters high. Also of note is the large elliptical staircase with a diameter greater than 9 meters.

The interiors are done in the style of Futurism, one of the few examples an interior created as such from the time. All the details were attended to by Mazzoni such as the copper-clad doors, the specially designed window handles, the lighting and the choice of marble and stone all from Italy except the black stone of the staircase, as he desired.

Most striking perhaps is the conference room, with works by the Futurist painter Benedetta Cappa,[5] five panels on canvas depicting land, sea, air, telegraphic, radio communications. There are also two paintings by Tato and another by Piero Bevilacqua, "Radio and television". Finally there is a bronze sculpture by Corrado Vigni, "Diana the Huntress".

The waiting room which precedes the conference room is impressive as well with an intense blue tiling.

Originally on the right side of the building there was a large lictorian beam, as tall as the entire building and also in marble, which was removed at the fall of the fascist regime.[6]