The biggest Philadelphia event was the Marian Congress of the Oriental Church held on October 22, 1954. The congress was a joint celebration between the Exarchate of the Byzantine Rite, the Ukrainian Catholic Archeparchy of Philadelphia, and the Archdiocese of Philadelphia. Ceremonies and Masses would be held at the Ukrainian Catholic Cathedral of the Immaculate Conception, the Cathedral Basilica of Saints Peter and Paul, and the Philadelphia Convention Hall and Civic Center. Over 30,000 people attended the main event at the Civic Center, including Gregorio Cardinal Agagianian, Patriarch of the Armenian Catholic Church, and Thomas Cardinal Tien, exiled Archbishop of Beijing. The Congress also featured a parade on the Benjamin Franklin Parkway which had 25,000 participants.