The Istanbul Convention is signed in Istanbul, Turkey.

The Council of Europe Convention on Preventing and Combating Violence Against Women and Domestic Violence, better known as the Istanbul Convention, is a human rights treaty of the Council of Europe opposing violence against women and domestic violence which was opened for signature on 11 May 2011, in Istanbul, Turkey. The convention aims at prevention of violence, victim protection and to end the impunity of perpetrators.

Istanbul is the largest city in Turkey, constituting the country's economic, cultural, and historical heart. With a population over 15 million, it is home to 18% of the population of Turkey. Istanbul is among the largest cities in Europe and in the world by population. It is a city on two continents; about two-thirds of its population live in Europe and the rest in Asia. Istanbul straddles the Bosphorus—one of the world's busiest waterways—in northwestern Turkey, between the Sea of Marmara and the Black Sea. Its area of 5,461 square kilometers (2,109 sq mi) is coterminous with Istanbul Province.

May 11 is the 131st day of the year in the Gregorian calendar; 234 days remain until the end of the year.