The crest allows us to identify the figure of the kneeling donor as Vincenzo Aschieri, who headed the Benedictine abbey of Novalesa (Turin) from 1398 and who died after 12 December 1452. The panels were painted by Giacomo Jaquerio, who was born in Turin and worked at the Court of Savoy, and became a leading name in the International Gothic style of Piedmont, France, and Switzerland. Courtly touches can be seen in the enamelled brilliancy of the colours, in the elegance of the lines, which are chased in the angel’s hair, and in the dreamy depiction of the pale pink castle against the ultramarine blue of the background