A world trade center is a term for a building, usually a complex of buildings used for the promotion and expansion of trade and licensed to use the "world trade center" term by the World Trade Centers Association (WTCA). As of May 2020, the WTCA included 323 properties in 90 countries. Founded in 1968, it serves as a non-political umbrella organization within which members network for the provision of trade services and to develop international trade relations. A World Trade Center brings services associated with global commerce together under one roof, the World Trade Center complex in New York City being the most popular and largest of them.