The introduction of Christianity to Ptolemais, as Acre was known in ancient times, dates back to Apostolic times. The Apostle Paul, returning from his trip to Macedonia, in Achaea and Asia, landed at Tyre, and from there traveled to Ptolemais, where he stayed some days with the local Christian community. The first Bishop known is Claro, who in 190 attended a Council meeting of some bishops of Phoenicia and Palestine to deal with the issue of the date of the Paschal feast. But we must go to the fourth century to find the next Bishop, Enea, who took part at the First Council of Nicaea in 325 and at the Synod held in Antioch in 341. Nectabo was one of the fathers of the first Ecumenical Council of Constantinople in 381. Between the 4th and 5th centuries lived Bishop Antiochus, opponent of Giovanni Crisostomo. Helladius participated in the first Council of Ephesus in 431. Paul took part in the Council held at Antioch of 445 to judge the work of Athanasius of Perre and at the Council of Chalcedon of 451. In 518 Bishop Giovanni signed a Synodal letter against Severus of Antioch and the Monophysite party. Finally, the last known Bishop is Giorgio, who attended the second Council of Constantinople in 553. With the conquest of the crusaders in the 12th century, the city, called San Giovanni D'Acri, became part of the Kingdom of Jerusalem and was a diocese of the Latin rite, headquartered at the Cathedral of the Holy Cross. Against the practice and ecclesiastical tradition orientale, the Crusaders captured the diocese, along with other southern Phoenicia, to the Patriarchate of Antioch, for discussion, to Jerusalem. After the fall of Jerusalem in 1187, the seat of the Patriarch moved to Shooting Guard and then in San Giovanni D'Acri in 1191; the Patriarch returned to Jerusalem in 1229, when the city was returned to the crusaders, then back to San Giovanni D'Acri in 1244. San Giovanni D'Acri had its own Bishop until 1263, when the Patriarchs of Jerusalem ruled in administration until the fall of the city in the hands of the Muslims in 1291. The most famous Bishop of San Giovanni D'Acri was the chronicler Jacques de Vitry. After the fall of Jerusalem in 1187, the seat of the Patriarch moved to Shooting Guard and then in San Giovanni D'Acri in 1191; the Patriarch returned to Jerusalem in 1229, when the city was returned to the crusaders, then back to San Giovanni D'Acri in 1244. San Giovanni D'Acri had its own Bishop until 1263, when the Patriarchs of Jerusalem ruled in administration until the fall of the city in the hands of the Muslims in 1291. The most famous Bishop of San Giovanni D'Acri was the chronicler Jacques de Vitry. Ptolemais in Phoenicia survives today as a titular see; the seat has been vacant since September 12, 1988. Until the mid-19th century it had the name Aconensis or Acconensis.
