We usually think of international organizations as a twentieth-century phenomenon that started with the establishment of the League of Nations in 1919. This is, for the most part, true. However, in the late nineteenth century nations had already established international organizations for dealing with specific issues. The foremost among them were the International Telecommunication Union (ITU), founded in 1865 (originally called the International Telegraph Union), and the Universal Postal Union, which dates back to 1874. Today, both of these organizations are part of the UN system. The International Peace Conference held in The Hague in 1899 established the Permanent Court of Arbitration, which started its work in 1902.