Rocca Martinengo (Rocca Oldofredi-Martinengo)

On a rocky spur above Menzino, a quadrangular fortress with round towers has watched the southern basin of Lake Iseo for some seven centuries. The Oldofredi-Martinengo rocca preserves its ravelin, Renaissance windows and commanding position above the water.

Why it matters

Every lake island needs a strongroom, and Monte Isola's was built where the water narrows towards the Bergamo shore. The fortress is one of the most characteristic monuments of the island, to quote the island's own tourism portal, and the regional heritage catalogue records it as a fortified complex built to control south-eastern Lake Iseo. Its succession of owners retells the lake's political history on its own: the Oldofredi family of Iseo raised it, the Martinengo bought and domesticated it, early modern chroniclers described it half-ruined, the Second World War saw it garrisoned again, and finally it was restored as a private residence.

What to notice

The rocca has a quadrangular plan. The enclosure is quadrangular, its lake-facing corners left sharp because the rock itself does the defensive work, while the landward corners carry two circular towers; the regional inventory places semicircular towers at the north-west and north-east angles. In the centre rises the oldest element, a cylindrical tower on a battered base that once served as the keep — a type the catalogue compares to the Torre Mirabella of Brescia castle. On the west side the entrance is preceded by a ravelin, an outwork built to protect the gate and its drawbridge. The large window frames are cut in moulded Sarnico stone. The bossed grey-sandstone portal, flanked by pilasters beneath an entablature inscribed "ex alto", marks the Martinengo conversion. Two curtain walls once ran down to the port of Sensole, giving the fortress protected access to the water.

Context and history

Irregularities in the plan suggest a circular watchtower stood here by the twelfth or thirteenth century; the Iseo family of Oldofredi raised the present structure in the fourteenth, choosing a spur opposite Tavernola from which the lake could be observed north to south — and deliberately not the island's summit, which the sanctuary already occupied. The Martinengo acquired the fortress in the course of the fifteenth century — the island portal associates the purchase with Antonio Prevosto around the middle of that century — and turned it into a residential palazzetto. Once Bergamo passed to Venice in 1427 the fortress lost its military purpose and became a residence, its transformation marked by the Sarnico-stone openings. Decline came early: by the late sixteenth century — some accounts say the late seventeenth — the site appears as a half-ruined rocca. Giovanni Da Lezze still praised its rooms in his 1610 survey, owners lamented decay by 1641, and by 1723 the catalogue records it as destroyed. The Salvadego family held it in the nineteenth century, the Mascheroni family of Monza bought and restored it in the 1960s, mid-century records note a wartime garrison, and a radical later restoration returned it to residential use.