Federico da Montefeltro
In 1433 he hired Federico III da Montefeltro to defend Pesaro and Fossombrone against his cousin Sigismondo Pandolfo from Rimini. Although he was able to keep his territories, and overwhelmed by the debts made to hire other condottieri, in 1444 he sold Pesaro to Alessandro Sforza in exchange of 20,000 florins. Two years later he gave Fossombrone to Federico da Montefeltro, for 13,000 florins. This caused the Pope to excommunicate him, since he had sold two towns which were nominally under papal rule.