Isabella Fieschi

Isabella Fieschi (fl. 1331–1356), daughter of the Genoese noble Carlo Fieschi, was a great-niece of Pope Adrian V. In 1331 she married Luchino Visconti in Milan, a match arranged to seal an alliance between Genoa and Milan. She became lady of Milan in 1339, when Luchino took power after the death of his nephew Azzone.

She was known for her beauty and her lovers. An official visit to Venice in 1347 turned scandalous over her affairs, and Luchino swore to punish her cruelly; he died shortly after, in 1349, rumoured to have been poisoned by her.

Her son was forced to give up his rights to power in Milan and she was placed under house arrest. In 1356 she escaped and reportedly returned to her family in Savignone.