Ahtisaari in Helsinki, 4 July 2007

Martti Oiva Kalevi Ahtisaari (pronounced ) (born 23 June 1937) is a former President of Finland (1994–2000), 2008 Nobel Peace Prize laureate and United Nations diplomat and mediator, noted for his international peace work.

Ahtisaari was a UN Special Envoy at the Kosovo status process negotiations, aimed at resolving a long-running dispute in Kosovo, which declared its independence from Serbia in 2008. In October 2008 he was awarded the Nobel Peace Prize "for his important efforts, on several continents and over more than three decades, to resolve international conflicts". The Nobel statement said that Ahtisaari has played a prominent role in resolving many conflicts in Namibia, Indonesia, Kosovo and Iraq, among other areas.