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The Castle of Castrum Coeli: The Fortress in the Sky That Named a Village
On the summit of Monte Asprano, at 750 metres a.s.l., the ruins of the Castle of Castrum Coeli command the middle Liri valley, the panorama stretching from Monte Cairo to the Aurunci Mountains. The name — literally "fortress of the sky" — says it all: the dizzying height of the site and its strategic function, controlling the approaches to Aquino and Roccasecca. The town of Castrocielo was born out of the demise of this castle.
From the Lombard Invasions to Frederick II
The origins go back to the 6th century, when families from Aquino took refuge on the mountain after their city was destroyed. In 994, Abbot Mansone of Montecassino climbed to the summit and found the remains of ancient structures; two years later he officially founded the castrum. By 1071 the castle had already been depicted on the bronze door of Montecassino Abbey. In 1231, Frederick II of Swabia included it in his programme of fortifications across southern Lazio, reinforcing its defensive structures.
Abandonment and Ruins
The lack of water and isolation from the rest of the world made life unsustainable. From the 16th century onwards, its inhabitants descended to the valley, founding Colle San Magno on one side and Palazzolo — today's Castrocielo — on the other. What remains of the castle now? The keep, sections of the curtain wall with arrow slits, and several towers. The most imposing tower, facing north towards Roccasecca, reveals two distinct building phases: an original rectangular core and a later semicircular addition. The site was restored in 2003.
