Kñnalñada (Turkish for: Henna Island; , 'first', known classically in English as Prote) is the fourth largest inhabited island in the Princes' Islands in the Sea of Marmara; near Istanbul, Turkey. It is also the closest of the islands to the mainland, lying about to the south. Administratively, it is a neighbourhood in the municipality and district of Adalar, Istanbul Province, Turkey. Its population is 2,025 (2022). In the past it was called Proti by its Greek residents.
Kñnalñada means "Henna Island" in Turkish, because the land has a reddish colour as a result of the iron and copper that has been mined there. It is dominated by ÃÂñnar Tepesi (Plane Tree Hill, 115 m/377 ft), Teà Ârifiye Tepesi (Visiting Hill, 110 m/360 ft) and Manastñr Tepesi (Monastery Hill, 93 m/305 ft). This is one of the least forested of the Prince Islands.
Proti (Greek: First) was the island most commonly used as a place of exile under the Byzantine Empire. The most notable exile was Emperor Romanos IV Diogenes, who remained in the Monastery of the Transfiguration on Hristo Peak of the island after the Battle of Manzikert in 1071. The island was also the burial place of the deposed Emperor Tiberius III.
The island is home to one former Greek Orthodox monastery, the Monastery of Christ.
The waterfront Kñnalñada Mosque is a rare example of modern architecture in the islands. It was designed in 1964 by Baà Âar Acarlñ and Turhan AyuroÃÂlu to evoke the shape of a yacht.
à Âehir Hatlarñ ferries connect the island with the mainland from terminals at Eminönü and Kabataà  on the European side of Istanbul and from Kadñköy and Bostancñ on the Asian side. As it is the closest of the Princes' Islands to the ferry terminals of mainland Istanbul, most of the ferries call first at Kñnalñada before continuing to Burgazada, Heybeliada and Büyükada.