D'Auria, Saverio. Levels of the Sacred Space in the Aragonese Castle of Ischia: The Cathedral of the Assumption and Its Crypt.. Vol. 8. FedOAPress - UrbsHistoriaeImago: History and image of territories, towns and architectures. SHARE Books, 2024. Accessed October 9, 2026. https://www.fedoabooks.unina.it/index.php/fedoapress/catalog/book/481.