Facade of the Basilica of Saint Colombano. The construction of the Monastero di San Colombano began towards the end of IX the century when Abbot Agilulf taken the decision to transport the entire cenobitico complex - the first nucleus had been developed around the basilica of Saint Peter where today it is the Castle. The current complex goes back to period 1456-1522 and only partially the structure of the ancient protoromanica basilica is saved of which they are visible a short section of the circular apse and leaves of the bell tower. Photography of and. Piccini