The masonry was protected by :
1. restoring the façades and constructing a protective course to shed rainwater;
2. cleaning and removing the weathered mortar and pointing the masonry.
In those sections of masonry where the bricks had been destroyed by weathering, to protect the core the façade was restored to a depth of 0.15–0.30 m by filling in the lacunae with new bricks, stamped with the date when the intervention was carried out (Charter of Venice, 1972). This intervention leaves the core of the masonry intact, it is reversible, and the restored areas are made clearly identifiable by outlining them with a mortar-filled joint.
The upper surface of the ruined masonry was covered with a protective row of stones or bricks, as appropriate, laid in accordance with the construction system used in each case. A joint of mortar was interposed between the authentic masonry and the added row. The protective row closely followed the line of the upper surface of the ruined masonry.
The disintegrating mortar in the joints in the walls was removed and replaced with fresh mortar compatible with the ancient mortar.
Addressing the 1970 interventions
The tasks here were to mark the boundaries of the sections that were rebuilt in 1970 with a joint, to dismantle the sections that had been improperly rebuilt, and to remove the strong cement mortar. Where the construction phases had been eliminated, they were not rebuilt, but are documented with information panels.
