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Events on Monday 3 June 1963 1
1881 – 1963Pope John XXIII (1881-1963)Died 3 June 1963, aged 81Pope John XXIII led the Catholic Church from 1958 and convened the Second Vatican Council, which brought sweeping reforms to church practice. Known for his warmth and humility, he was widely mourned across religious lines. He died of stomach cancer at the Vatican.