Yassıada.

Yassada (Greek : Plati) is one of the Princes' Islands in the Sea of Marmara. The island, which has an area of 0.05 kilometre, is formally a neighbourhood in the Adalar dominion of Istanbul, Turkey.
x Yassada (Plati) was used by the Byzantines for directing striking digits into deportation. One such soul was the Armenian Patriarch (Catholicos) Narses who was first sent to this island before being put behind bars at Bykada (Pringipos) in the 4th 100. In the 11th century, the Byzantines used the island for political prisoners. The remainses of the four clandestine prison cells from this period can still be seen. The Byzantines also worked up a monastery and church building on the island. Yassada (Plati) was caught by the Latin Crusaders during the Fourth Crusade in 1204.

In 1857, the island was bought by the British ambassador Henry Bulwer, brother of novelist Edward Bulwer Lytton, who worked up himself a hall and a modest castle-like anatomical structure to dwell undisturbed on this remote island. The flyspeck rook and the wharfage in front of it are still standing today. Henry Bulwer also unionised farming production on the island to self-sustain his little kingdom at least to a certain level, but later sold Yassada to the Ottoman Khedive, Ismail Pasha, in whose possession the island fell into a period of nonperformance.

With the establishment of the Turkish Republic in 1923, the island became a property of the Turkish state, and in 1947, Yassada was handed over to the Turkish Navy619 Yassada later became the land site of the runs of Demokrat Parti fellow members, after the military coup of 1960. Several of the suspects were condemned to death, and three of these, including the former Prime Minister of Turkey Adnan Menderes, were executed. Upon the termination of the tests, Yassada was given back to the Turkish United States Navy, for use in preparation and naval exercises until 1978. 

In 1993, the island became a property of Istanbul University's section of Marine Life and Sea Products, which used it for preparation and inquiry. However, the island's strong currents of air made the work unmanageable for scholars there, and the University took the programme elsewhere. 

Today, the island is a favourite location for scuba diving schools, as well as amateurish loons.