The Preliminary Treaty of San Stefano (Russian: Сан-Стефанский мир; Peace of San-Stefano, Сан-Стефанский мирный договор; Peace treaty of San-Stefano, Turkish: Ayastefanos Muahedesi or Ayastefanos Antlaşması ) was a treaty between Russia and the Ottoman Empire signed at San Stefano, then a village west of Constantinople, on 3 March 1878, by Count Nicholas Pavlovich Ignatiev and Aleksandr Nelidov on behalf of the Russian Empire and Foreign Minister Safvet Pasha and Ambassador to Germany Sadoullah Bey on behalf of the Ottoman Empire. The treaty ended the Russo-Turkish War, 1877–78.