Castellino Beccaria

Castellino Beccaria (born c. 1300, died 1358) was a Ghibelline nobleman of Pavia who succeeded his father Musso as signore of the city in 1343 and ruled until his death.

In 1346 he stood godfather to Luchino Novello, son of the Milanese lord Luchino Visconti. After Luchino's death his exiled nephews came to power in Milan, and Castellino joined a coalition against Galeazzo II Visconti alongside Ludovico I Gonzaga and John II of Montferrat.

He died at Pavia in 1358, leaving no children; the signoria passed to his brother Leodrisino. Guelfs then tried to found a republic, but the Visconti captured the city and added it to their domain.