The lower registers of the walls have large drops of plaster / plaster resulting in the loss more or less partial decor; water carrying soluble salts that have subsequently crystallized is likely to cause degradation of these areas.
Some cracks are present ("Moses and the Burning Bush", "Summer").
There are also many evolutionary uprisings and many long-standing gaps throughout the Old Testament cycle.
Some gaps are present in the Seasons, perhaps due to the presence of moisture in the walls.
Photos and texts extracted from "TECHNICAL MEMORY Italian Room - City Hall, former Episcopal Palace of Viviers" - February 26, 2016 - by Laurence Didier - all rights reserved