The Prinkipo Greek Orphan­age (Turk­ish: Prinkipo Rum Yetimhane­si, also known as Prinkipo Palace or Büyüka­da Greek Orphan­age) is a his­toric 20,000-square-meter wood­en build­ing on Büyüka­da, one of the nine Princes’ Islands off the coast of Istan­bul, Turkey, in the Sea of Mar­mara. It is con­sid­ered the largest wood­en build­ing in Europe and sec­ond largest in the world. It served as an orphan­age from 1903 to 1964.