Tortona

Tortona was a commune in the western Po valley. In 1337 it retained communal institutions, though it had passed between local lords and adventurers since 1260.

In 1347 the Visconti of Milan incorporated Tortona into their dominion. It remained under Milan until 1735, when the King of Sardinia occupied it during the War of the Polish Succession; the title Count of Tortona was added to those of the House of Savoy.