Bartolomeo Casali
Bartolomeo Casali (c. 1315–1363) succeeded his father Ranieri II as signore of Cortona in 1351. In 1352, serving Giovanni Visconti of Milan, he invaded Perugian territory and seized the fortress of Bettona by bribing its podestà; besieged by Perugia, Siena and Florence, he escaped in disguise, and in February 1353 publicly begged Perugia's pardon with a rope around his neck.
Emperor Charles IV confirmed him as imperial vicar in 1355. Perugia besieged Cortona in 1357, and in 1358 Bartolomeo allied with Siena; he died of plague in 1363 and was succeeded by his son Francesco I.