The building is an example of neo-classical architecture, and was designed by Italian architects Guido Ottavo and Cabiati Ferrazza. The cathedral's architecture is based on that of a basilica. The entrance has a portico with six Doric columns. Its two characteristic domes cover both spans of the nave, while a series of oculi provide the cathedral's lighting. The building is heavily inspired by Italian religious architecture. Original plans show that the cathedral was not completed as planned; the drawings included a three story bell tower which was never built. It is nevertheless one of the largest churches in North Africa.