the cathedral episcopal see in Alexandria, Saint Catherine. the co-cathedral and former cathedral Notre-Dame of Heliopolis, in Egypt's metropolitan national capital Cairo's suburb Heliopolis, formerly seat of a separate apostolic vicariate Heliopolis in northern Egypt the co-cathedral and former cathedral Our Lady and St. Michael, in Port Said, formerly seat of a separate apostolic vicariate in southern Egypt Basilica of St Therese of the Child Jesus, Cairo, a minor basilica.