For over a century the basilica complex of Galliano has been subject to
numerous restoration and maintenance interventions. In particular, in the 1930s and 1950s, the frescoes in the apse and triumphal arch have undergone two restoration campaigns by Mauro Pellicioli. However, in the 1980s, serious problems with the adherence of the plaster and deterioration of the painted surfaces due to humidity have
made another campaign necessary for the fixing and cleaning of thesurfaces.
The work has turned out to be an invaluable opportunity to closely study the procedures used in the frescoes.