The castrum (fortress) of Montecelio was already mentioned in a Papal Bull of 832, as being a part of the properties of the Subiaco monastery.

The fortress stands in a dominant position on one of the peaks of the Cornicolani Mountains, exploiting the remains of cyclopean walls that constitute the foundations of the perimeter walls. Even in Roman days there was an acropolis here with a classical Corinthian temple, of which considerable ruins remain, and which dates back to the 1st – 2nd C. AD.

After the fire caused by the army of Henry III in 1047 and the Norman invasions which followed, the Fortress was rebuilt and a pentagonal tower was added which acted as a buttress.
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Galleria fotografica