 The Ducal Chapel is a little room with elegant geometric lines, destinated to private praying.An old tradition argued that Renée de France - wife of Duke Ercole II of Este who had Calvinist sympathies - ordered this particular decoration, without sacred images.On the walls, coated all over with precious polychrome marbles, no sacred image - either painted or in mosaic - is actually represented, as one would at least expect in the small niches.