Galeazzo Maria Sforza was the fifth Duke of Milan from 1466 until 1476. He was notorious for being lustful, cruel, and tyrannical.
Galeazzo Sforza, by Piero Benci, Uffizi Gallery
Lament of the duke Galeazzo Maria (1476).
Lampugnani's Conspiracy by Francesco Hayez, 1826
Francesco I Sforza was an Italian condottiero who founded the Sforza dynasty in the duchy of Milan, ruling as its (fourth) duke from 1450 until his death.
Portrait of Francesco Sforza (c. 1460) by Bonifacio Bembo. Sforza insisted on being shown in his worn dirty old campaigning hat. Pinacoteca di Brera, Milan
Bianca Maria Visconti in a portrait by Bonifacio Bembo, Pinacoteca di Brera, Milan.