The latest news and top stories on Mercosur. A prominent South American based intergovernmental organisation, Mercosur is dedicated to promoting free trade and the fluid movement of goods, services, capital and people among its member states. Headquartered in Montevideo, Uruguay, this regional economic integration bloc focuses on fostering economic cooperation, establishing a common external tariff and enhancing regional integration. Established in 1991 by the Treaty of Asunción, Mercosur is recognised as one of the world’s largest integrated markets, significantly increasing intra-bloc trade and aiming to boost its members’ economic standing globally.