Kınalıada (Greek: Πρώτη, Proti 'first') is an island in the Sea of Marmara; it is the closest of the Princes' Islands to Istanbul, Turkey, about 12 kilometres (7 mi) south. Administratively, it is a neighbourhood in the Adalar district of Istanbul.
Kınalıada means "Henna Island" in Turkish, as the land has a reddish colour from the iron and copper that has been mined here. This is one of the least forested of the Princes' Islands.
Proti was the island most used as a place of exile under the Byzantine Empire. The most notable exile was emperor Romanos IV Diogenes, after the Battle of Manzikert in 1071, who remained in the Monastery of the Transfiguration on Hristo Peak of the island.