Seyyed Abolhassan Banisadr (pronunciation ; Persian: سید ابوالحسن بنی‌صدر‎; born 22 March 1933) is an Iranian politician. He was the first President of Iran after the 1979 Iranian Revolution abolished the monarchy, serving from 4 February 1980 until he was impeached by parliament on 20 June 1981. Prior to his presidency, he was the minister of foreign affairs in the interim government. He has resided for many years in France where he co-founded the National Council of Resistance of Iran. At age 86, Banisadr is currently the oldest living former Iranian President.

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