Isola Comacina

Isola Comacina is a small wooded island of Italy’s Lake Como, administratively a part of the commune of Ossuccio. It is located close to the western shore of the Como arm of the lake in front of a gulf known as Zoca de l'oli, a Lombard name referring to the local small-scale production of olive oil. In the late 6th century the island was a remaining Roman stronghold under Francio, a subordinate of Narses; though the areas surrounding Lake Como were entirely controlled by the Lombards. The island was besieged for a good deal of time by the Lombards under Authari who released Francio to flee back to Narses' capital at Ravenna. The Lombards found the island to contain "many riches" deposited for safekeeping by local Roman loyalists.

Description via Wikipedia. Coordinates and heritage data from the Atika atlas.