The work, before restoration, showed a problematic state of preservation. In particular, there were visible altered touch-ups and some misshaping of the stretcher on the right side of the painting.

 In correspondence with the retouching and deformations, there was evidence of previous lacerations which were visible on the back; these involved new cloth inserts and were applied with hot glue.  

  It is probable that, during the repair work, the glue was accidentally poured on the canvas and the high temperature irreparably damaged the pictorial layer: this subsequently justified the grouting and retouching. The areas affected by these damages concern the Cardinals in the vicinity of the Lateran Basilica, the last of the kneeling figures, the child with his mother and part of the road pavement. The face of Pius IX was also involved in the areas that had to be repaired and his physiognomy was completely altered by retouching. The canvas had been previously fully re-stretched.

An older restorative varnish, now opaque and yellowed, had modified the original color. The wooden stretcher of the picture was still functional for the mechanical tension of the canvas (using angular wedges).  The work was dirty and had a poorly preserved gilt frame.

When the painting was transferred to the Painting Restoration Laboratory, the frame and stretcher were immediately treated with Antitone, a biocidal product to treat woodworms, and was applied by brush. The greasy powder on the paint layer was removed with a high absorption sponge soaked in water. It was then wiped over the canvas to remove the paint and retouches, using a mixture of chemical solvents that had been previously tested. The removal of these overlapping layers revealed a discreet state of preservation of the original pictorial layer, with the exception of the areas already mentioned. The removal of the retouching proved to be simple and permitted appreciation for the actual state of the painting and those parts involved in the hot glue reparations. The few gaps in the pictorial layers have been rehabilitated with Bologna plaster and rabbit glue. The old plastering and the former reparations of the canvas were not removed because they were still stable, even if there were some superficial irregularities and situations of fragility on the edges. The latter was treated with an acrylic adhesive. To flatten the misshaping of the canvas support, a mechanical pressure was exerted through the use of magnets and two layers of plexiglass placed on the pictorial layer and on the back of the painting.The pictorial reintegration was carried out using colored acrylic tempera paints. Finally, the work was protected with a layer of transparent spray varnish.

 

Scientific Analysis

The Vatican Museums’ Diagnostic Laboratory for Preservation and Restoration has carried out a series of scientific images (UV and IR) and a high definition IR reflectography, limited to the face of Pius IX which was damaged by glue and retouches. These analyses made it possible to detect the presence of gaps, the original preparatory drawing and what remains of the pope's face. Scientific investigations were very useful for the pictorial reconstruction of the face, following what would have been the original version of the painting.     

 

Photographic Documentation

The Photographic Laboratory of the Vatican Museums made a complete digital photographic documentation of the state of preservation of the painting before the restoration, the preliminary cleaning tests and the painting at the end of the intervention. Photographic footage of the process was also carried out by the restorer responsible for the work.