A concrete spiral staircase inside the tower leads to a small landing and a roof terrace.  Photo 6 of 10 in How They Pulled It Off: A Hilltop Home in Italy Built Around a 17th-Century Watchtower

How They Pulled It Off: A Hilltop Home in Italy Built Around a 17th-Century Watchtower

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A new spiral staircase inside the tower provides structural support, and leads to a small landing and a terrace.