This treaty was signed at the end of the Crimean War by Austria, France, Great Britain, Prussia, Russia, Sardinia, and Turkey. It was meant to strengthen the security of the Ottoman (Turkish) empire and limit the power of Russia. The other powers undertook to respect the integrity of Turkey and admitted her to the Concert of Europe: in return the sultan promised good treatment of his Christian subjects. The Black Sea was to be neutralized, its waters open to the merchant ships of all nations, but closed to warships. This meant dismantling the Russian Black Sea fleet. In 1870 Russia unilaterally abrogated the Black Sea clauses.
Subjects: World History — British History.