Pope John XXIII, born Angelo Giuseppe Roncalli in 1881, served as the head of the Roman Catholic Church from 1958 until his death in 1963. He is best known for initiating the Second Vatican Council, which aimed to address relations between the Catholic Church and the modern world. His papacy emphasized openness, dialogue, and reform within the Church. John XXIII was canonized as a saint in 2014, reflecting his lasting impact on the Church and its followers. He is remembered for his warmth, humility, and commitment to social justice, which inspired many to engage in humanitarian efforts and interfaith dialogue.