The restoration project, expected to last approximately five months, aims to ensure the structural stability of the altarpiece, halt active deterioration processes, and restore its original aesthetic. The work will include dismantling, packaging, structural consolidation, surface treatment, and reassembly of the piece.

The preliminary technical analysis revealed that while natural aging of materials is the primary cause of deterioration, the fire that occurred last August and the subsequent partial collapse of the vault caused detachments of elements that were later recovered. The reintegration of gilding will be carried out using the rigattino technique, employing metallic pigments to differentiate additions from the original.

Among the pathologies detected are friction, impacts, warping, disassemblies, instability in joints, loose pieces, cracks, fissures, weak adhesives, micro-fissures, and corrosion in metallic elements within the structure and sculptures. The gilded surface shows generalized dirt, detachments, exfoliation, oxidized varnishes, gaps, risks of new detachments, wear, repainting, and lifting. Although no active biological pathologies were found, remnants of old infestations treated after the incident were present. Furthermore, the incidence of solar radiation through damaged stained-glass windows has been identified, causing light and thermal fluctuations, as well as pollution.

The central canvas of The Annunciation, part of the ensemble, is stable but requires continuous monitoring. The medallions, sculptures, and reliefs show superficial dirt, localized losses of polychromy, and micro-fractures, underscoring the necessity of this comprehensive intervention to preserve the altarpiece's artistic and historical value.