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The "Tome" is a significant theological work by Pope St. Leo I, also known as Leo the Great. Written around 449 CE, the Tome addressed the teachings of the monk Eutyches, who believed Christ had only one nature. Leo's Tome precisely articulated the doctrine of Christ's Incarnation, asserting that Christ possesses two natures—fully human and fully divine—united in one person. This theological formulation was crucial in combating heresy and was later affirmed as the ultimate truth by the Council of Chalcedon in 451 CE. Leo's insightful writings and strong leadership during a turbulent period for the Roman Empire earned him the title "Leo the Great".12

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  1. St. Leo I: Top Questions
  2. St. Leo I

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