Our Lady of Heliopolis Co-Cathedral  The Our Lady of Heliopolis Co-Cathedral or "Latin Cathedral of Our Lady of Heliopolis" is a religious building belonging to the Roman Catholic Church and is located in on the square El-Ahram, Heliopolis part of Cairo, Egypt. Follow the Roman or Latin rite and is under the jurisdiction of the Vicariate Apostolic of Alexandria of Egypt ("Vicariatus Apostolicus Alexandrinus"). It is co-catedral since 2008. In 2014 members of various Christian denominations gathered at the site to pray for the country's future after the events in the Arab spring.