The Relationships Between the «Ruling Classes» and the Cities of the Po Valley (Mid-11th-Mid-12th Centuries): Summary of a Research Path and First Notes for a New One. SSMD [Internet]. 2019 Dec. 18 [cited 2026 Jul. 27];(3):5-42. Available from: https://test-ojs-unimi-it.archicoop.it/index.php/SSMD/article/view/12577