Isotta degli Atti
Italian regent
Isotta degli Atti was an Italian Renaissance woman and regent. She was the mistress and later wife of the condottiero and lord of Rimini, Sigismondo Pandolfo Malatesta. She governed Rimini as regent during the excommunication of Malatesta in 1460-62, as well as during the minority of their son in 1468–69.