Catholic Ceremony Catholic ceremony, there are many Catholic churches around Greece (please ask for a list of these), where you can hold a Roman Catholic wedding ceremony, all requirements and regulations that apply in your parish will also apply oversees, the ceremony is performed in English. Please note that you will have to supply a baptism certificate to prove that you have both been baptized in the Christian faith and at least one of you is Catholic. Please note Catholic ceremonies are held indoors in a Catholic Church only.