The International Peace Bureau, founded in 1891, is one of the world's oldest international peace federations. The organisation was awarded the Nobel Peace Prize in 1910 for acting "as a link between the peace societies of the various countries". In 1913, Henri La Fontaine was also awarded the Prize "[For his work as] head of the International Peace Bureau". As of 2012, eleven other Nobel Peace Prize laureates have been members of the IPB. The Nobel Peace Prize 1910, announced December 10, 1910. Permanent International Peace Bureau, “for acting as a link between the peace societies of the various countries, and helping them to organize the world rallies of the international peace movement”. Wiki link Data: the Nobel Foundation (CC0).