Phanar Greek Orthodox College or Phanar Roman Orthodox Lyceum known in Greek as the Great School of the Nation (Greek: Μεγάλη του Γένους Σχολή, Megáli toú Genous Scholí), is the oldest surviving and most prestigious Greek Orthodox school in Istanbul, Turkey. The school, like all minority schools in Turkey, is a secular school.
Εstablished in 1454 by the Patriarch, Gennadius Scholarius who appointed the Thessalonian Matthaios Kamariotis as its first Director. It soon became the school of the prominent Greek (Phanariotes) and other Orthodox families in the Ottoman Empire, and many Ottoman ministers as well as Wallachian and Moldavian princes appointed by the Ottoman state, such as Dimitrie Cantemir, graduated from it.
The current school building is located near the Church of St. George in the neighborhood of Fener (Phanar in Greek), which is the seat of the Patriarchate. It is known among the locals with nicknames such as The Red Castle and The Red School.