Sant’Angelo castle Museum

Passing through the entrance gate, we finds ourselves in an annular corridor included within the castle's quadrangular wall, which was obtained at the end of the 14th century by uncovering the square basement of the Hadrianic construction in order to isolate the large central cylinder and adapt it to the new defensive requirements. The work, promoted by Pope Boniface IX Tomacelli (1389-1404) and entrusted to the Florentine architect Niccolò di Pietro Lamberti (c. 1370-early 1434), brought to light the Roman-era walls that bordered the radial cells originally placed as the base of the mausoleum. These brick rooms, now partially visible to the side of the main entrance, together with part of the original paving located near the secondary access portal and consisting of a pavement of large marble blocks, are what remains of the Roman structure at this level.

Edilerica's intervention included consolidation of the most decohesive points, especially of the peperino ashlars, general washing with a controlled pressure water jet and application of products to eliminate attacks of microorganisms such as algae, lichens and mosses. Nylon thread tensioners were also applied in the largest holes to keep birds away, and extensive grouting was carried out with pieces of salvaged bricks and tuffelli, which together with the mortars restored colors and glanumetries similar to the original, giving continuity of reading to the masonry as a whole.