A strait connecting the Aegean Sea with the Sea of Marmara. An important shipping channel, it marks the conventional boundary between Asia and Europe.
Strait joining the Sea of Marmara and the Aegean Sea, between European & Asiatic Turkey: c. 40 mi (64 km) long; 1-4 mi (1.6-6.4 km) wide.
The strait connecting the Sea of Marmara with the Aegean Sea to the west.
Russia was to acquire the Dardanelles, the Sea of Marmora, the Bosphorus with Constantinople, and Corfu.
In a secret article of the treaty the sultan undertook in the event of a casus foederis arising, and in consideration of being relieved of his obligations under the articles of the public treaty, to close the Dardanelles to the warships of all nations " au besoin," which meant in effect that in the event of Russia being threatened with an attack from the Mediterranean he would close the Dardanelles against the invader.
The Tatars of the Bug, of the Crimea and of the Kuban were liberated from the suzerainty of the Porte; Azov, Kinburn and all the fortified places of the Crimea were ceded to Russia; the Bosphorus and Dardanelles were opened to Russian merchant vessels; and Russian ambassadors obtained the right to intervene in favour of the inhabitants of the Danubian principalities.
Towards the Black Sea, the less elevated Istranja Dagh stretches from north-west to south-east; and the entire south coast, which includes the promontory of Gallipoli and the western shore of the Dardanelles, is everywhere hilly or mountainous, except near the estuaries of the Maritza, and of the Mesta, a western frontier stream.
Greekce and Dardanelles confirmed, and the districts of first sultan who entered into regular relations with foreign powers, and employed permanent ambassadors; the practice was discontinued at the time of the Greek revolution and the consequent rupture with the powers.