Southern Italy and Sicily had a strong connection with Greece in antiquity and for many centuries there was a large Greek-speaking population there. In the early centuries of the Christian era, although most of the Christians were of the Byzantine tradition, the area was included in the Roman Patriarchate, and a gradual but incomplete process of latinization began.
During the 8th century, Byzantine Emperor Leo III removed the region from papal jurisdiction and placed it within the Patriarchate of Constantinople. There followed a strong revival of the Byzantine tradition in the area. But the Norman conquest in the early 11th century resulted in its return to the Latin Patriarchate. By this time the local Byzantine church was flourishing, and there were hundreds of monasteries along the coasts of southern Italy. The Normans, however, discouraged Byzantine usages in their lands, and the Greek bishops were replaced by Latin ones. This marked the beginning of a process which led to the almost total absorption of the Byzantine faithful into the Latin church.
This decline was reversed in the 15th century with the arrival of two large groups of Albanian immigrants who had fled their country following its conquest by the Turks. Those from the northern part of Albania, where the Latin rite was prevalent, were quickly absorbed into the local population. But those from the Orthodox south of the country remained loyal to their Byzantine heritage. At first they met with little understanding from the local Latin bishops. Although in the 16th century Popes intervened in favor of the Byzantines - in 1595 an ordaining bishop was appointed for them - the community continued to decline.
The situation began to improve in the 18th century. In 1742 Pope Benedict XIV published the bull Etsi Pastoralis which was intended to buttress the position of the Italo-Albanians in relation to the Latins. It paved the way for more progressive legislation - and recognition of the equality of the Byzantine rite with the Latin - in the next century.
Italo-Albanian seminaris were founded in 1732 in Calabria and in 1734 in Palermo. Seminarians in advanced theological studies in Rome reside at the Greek College (founded in 1577).
Today there are two dioceses of equal rank for the Italo-Albanians: the diocese of Lungro (in Calabria) was founded in 1919, has 27 parishes, and has jurisdiction over continental Italy; the diocese of Piana degli Albanesi, founded in 1937, covers all of Sicily and has 15 parishes. Alongside these two dioceses is the monastery of Santa Maria di Grottaferrata, just a few miles from Rome, which, having been founded in 1004, is the only remnant of the once-flourishing Italo-Greek mmonastic tradition. In 1937 the monastery was given the status of territorial abbey, according to which the abbot exercises jurisdiction over the monks and local faithful similar to that of a diocesan bishop.
The Italo-Albanians have no parishes in the English-speaking world, but the identity of the small imimigrant communities in these areas has been preserved through such groups as the Italo-Albanian Byzantine Rite Society of Our Lady of Grace based in Staten Island, New York.