Bernabò or Barnabò Visconti was an Italian soldier and statesman who was Lord of Milan. Along with his brothers Matteo and Galeazzo II, he inherited the lordship of Milan from his uncle Giovanni. Later in 1355, he and Galeazzo II were rumoured to have murdered their brother Matteo since he endangered the regime. When Galeazzo II died, he shared Milan's lordship with his nephew Gian Galeazzo. Bernabò was a ruthless despot toward his subjects and did not hesitate to face emperors and popes, including Pope Urban V. The conflict with the Church caused him several excommunications. On 6 May 1385, his nephew Gian Galeazzo deposed him. Imprisoned in his castle, Trezzo sull'Adda, he died a few months later, presumably from poisoning.

Galeazzo II Visconti was a member of the Visconti dynasty and a ruler of Milan, Italy. His most notable military campaigns were against Pope Gregory XI, around 1367. These battles fought between the papacy and the Visconti family ultimately ended in a peace treaty. Politically active, he expanded the power of his family, where the Visconti first became hereditary rulers of Milan starting in 1349. He is remembered in conjunction with his patronage of intellectuals and writers, from his sponsorship of Petrarch to the founding of the University of Pavia in 1361. Galeazzo II Visconti, and his brother Bernabò, are credited with the institution of the Quaresima Torture Protocol, a vicious means of torture.