Liborius of Le Mans was a fourth-century bishop who served the see of Le Mans in Gaul for approximately 49 years. A contemporary of Saint Martin of Tours, he is said to have ordained hundreds of clergy during his long tenure. He died in 397, reportedly in the presence of Martin of Tours. He is recognized as a saint in the Catholic tradition and is celebrated as the patron of the archdiocese of Paderborn, where his relics were transferred in the ninth century.