Constantin Cantemir, Prince of Moldavia, and the Holy Roman Empire sign a secret treaty in Sibiu, stipulating that Moldavia would support the actions led by the House of Habsburg against the Ottoman Empire.

Constantin or Constantine Cantemir was a Moldavian nobleman, soldier, and statesman who served as voivode between 25 June 1685 and 27 March 1693. He established the Cantemir dynasty which—with interruptions—ruled Moldavia prior to the imposition of phanariot rule.