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Events on Monday 4 August 1879 1
1879Pope Leo XIII Issues Aeterni PatrisEncyclical revives Thomas Aquinas as the basis of Catholic philosophyPope Leo XIII's encyclical Aeterni Patris called for a revival of the philosophy of Thomas Aquinas in Catholic education and thought. It launched the Neo-Thomist movement, which shaped Catholic intellectual life for decades. The encyclical remains a foundational document in modern Catholic philosophy.