Cetatea Enisala

ENISALA - the Fortress from Dobrogea...

The Enisala Fortress (often referred to as Heracleea Fortress) is a 12th to 14th century medieval fortress sitting high on a hill overlooking Lake Razim (Razelm) and a vast field of reed grass and water channels, in Tulcea County, Romania.

Byzantine citadel certified in 1270 had a great military importance while Razelm lake was a Black Sea Bay. The citadel was situated at the turning of two important comercial routes between the Orient and the North of Europe. It was controlled by the Genoveses for 150 years 
The fortress was first conquered by the Ottomans in 1388/1389, and retaken in 1416/1417 after a brief Wallachian rule (it belonged to Wallachia's Prince Mircea the Elder). It was conquered by Sultan Mehmet I in 1417 (who renamed it "o Yeni Sale"). Due to the new political situation and the development of sand spits that hampered trade, the fortress gradually decayed, and was finally abandoned around the end of the 15th century.
http://wikimapia.org/972075/Enisala-Fortress

AdamClisi...

In ancient times, a Roman castrum named Civitas Tropaensium was settled here and in 109 AD a monument named Tropaeum Traiani was built to commemorate the Roman Empire's victories over the Dacians.

Colonized with Roman veterans of the Dacian Wars, the city was the largest Roman city of Scythia Minor and became a municipium in the year 170. Destroyed by the Goths, it was rebuilt during the rule of Constantine the Great with better defensive walls, which defended the city successfully until the Avars sacked it in 587. After that moment, it ceased to be among the important cities of Dobrogea and was no longer mentioned for seven hundred years.

During the Ottoman rule, the village was re-founded by Turkish settlers. After Dobruja was awarded to Romania, in 1878, the Muslim population left for Turkey, leaving the village deserted. However, in 1880 – 1881, the village was re-settled with Romanians from Transylvania and Teleorman.

The current name has a Turkish origin and it is an adaptation in Romanian of "Adam Kilisse" which means "the church of man" (when the Turkish people settled in this area, they thought the Ancient Roman monument was a church). (Wikipedia)