House of Sforza
In 1331 Pontremoli was sold by John I of Bohemia to Mastino II della Scala (Lord of Verona). Pontremoli was later taken over by the Visconti of Milan in 1339. In 1404 the ownership of Pontremoli once again changed hands as it was seized by the Fieschi family of Genoa. However, by 1433 Pontremoli was again under the control of the Milanese. In 1495 Pontremoli was sacked by the troops of Charles VIII of France. During this time Pontremoli was a territory owned by the House of Sforza, who were the new Dukes of Milan.