Grosso - Guidobaldo I of Montefeltro saint on horseback

Guidobaldo I inherited Urbino from his father Federico da Montefeltro in 1482 at age ten, and his reign was anything but stable — Cesare Borgia seized the duchy outright in 1502, forcing Guidobaldo into exile. He was restored the following year through a coalition of Italian powers alarmed by Borgia expansion, but the interruption almost certainly disrupted mint operations at Urbino entirely. Coinage attributable specifically to the years of Borgia occupation is practically nonexistent.

The CNI XIII references for this type span a narrow die grouping, with specimens numbered 9 through 14 showing minor legend variations that likely reflect sequential die cutting rather than distinct emission periods.