1 Quattrino - Guidobaldo II della Rovere

Guidobaldo II ruled Urbino under the long shadow of his father Francesco Maria I, who had spent decades fighting to reclaim the duchy from papal annexation. By the time Guidobaldo consolidated his position in the late 1530s, the Della Rovere mint at Urbino was producing small billon issues largely for local market transactions — the quattrino being the lowest practical denomination in circulation. His reign coincided with the duchy's gradual cultural and economic absorption into the orbit of the Counter-Reformation papacy, a relationship he managed through careful political marriages rather than military resistance.

CNI XIII records multiple die variants across the long span of this issue, with catalogued numbers running from #179 to #202.