Guillaume Metten (19 July 1938 - 13 November 2020)[1] is a senior former Belgian diplomat and Belgian ambassador to Iran, India, Nepal, Bhutan, Sri Lanka, the Maldives, Morocco and Mauritania. At present he is vice president of European Institute for International Law and International Relations. He is one of seven EU ambassadors signed for the right of Iran to possess the nuclear technology for pacific purpose in 2011, This piece was written and signed by seven former ambassadors to Iran from European countries: Richard Dalton United Kingdom, Steen Hohwü-Christensen Sweden, Paul von Maltzahn Germany, Guillaume Metten Belgium, François Nicoullaud France and Roberto Toscano Italy.