The Church of St. Mary of the Admiral (), also called Martorana, is the seat of the Parish of San Nicolò dei Greci (), overlooking the Piazza Bellini, next to the Norman church of San Cataldo, and facing the Baroque church of Santa Caterina in Palermo, Sicily, southern Italy. The church is a Co-cathedral to the Eparchy of Piana degli Albanesi of the Italo-Albanian Catholic Church, a diocese which includes the Italo-Albanian (Arbëreshë) communities in Sicily who officiate the liturgy according to the Byzantine Rite in the Koine Greek language and Albanian language. The Church bears witness to the Eastern religious and artistic culture still present in Italy today, further enhanced by the Albanian exiles who took refuge in southern Italy and Sicily from the 15th century under the pressure of Turkish-Ottoman persecutions in Albania and the Balkans. The latter influence has left considerable traces in the painting of icons, in the religious rite, in the language of the parish, in the traditional customs of some Albanian colonies in the province of Palermo. The community is part of the Catholic Church, but follows the ritual and spiritual traditions that largely share it with the Eastern Orthodox Church. The church is characterized by a multiplicity of styles that meet, since, through the succession of centuries, it was enriched by various tastes in art, architecture and culture. Today, it stands as a church-historical monument, and subject to protection. Since 3 July 2015 it has been part of the UNESCO World Heritage Site known as Arab-Norman Palermo and the Cathedral Churches of Cefalù and Monreale. History The eponym Ammiraglio ("admiral") derives from the Syrian Christian admiral and principal minister of King Roger II of Sicily, George of Antioch, whose palace and property overlapped with the area, and who first patronized its establishment. The foundation charter of the church (which was initially Eastern Orthodox), in Koine Greek and Arabic, is preserved and dates to 1143; construction may already have begun at this point. The church had certainly been completed by the death of George in 1151, and he and his wife were interred in the narthex. In 1184 the Arab traveler Ibn Jubayr visited the church, and later devoted a significant portion of his description of Palermo to its praise, describing it as "the most beautiful monument in the world." After the Sicilian Vespers of 1282 the island's nobility gathered in the church for