The Martorana Also Co-Cathedral of St. Mary of the Admiral is the seat of the parish of San Nicolò dei Greci, a Co-cathedral overlooking the Piazza Bellini in Palermo, Sicily, southern Italy. The church belongs to the Eparchy of Piana degli Albanesi of the Italo-Albanian Catholic Church, a diocese which includes the Albanian communities in Sicily who officiate the liturgy according to the Byzantine Rite in the ancient Greek language.
The church is characterized by the multiplicity of styles that meet, because, with the succession of centuries, it was enriched by various other tastes in art, architecture and culture. Today, it is, in fact, as a church-historical monument, the result of multiple transformations, also subject to protection.