Apart from the church of San Giovanni a Mare, Norman buildings in Naples were mainly lay ones, notably castles (Castel Capuano and Castel dell'Ovo), walls and fortified gates.
San Giovanni a Mare kiriku kõrval olid normannide ehitised Napolis peamiselt ilmalikud, eelkõige lossid (Castel Capuano ja Castel dell'Ovo), linnamüürid ja kindlustatud väravad.