Agobard of Lyon was a Spanish-born priest and archbishop who served during the Carolingian Renaissance. Born in Catalonia around 769, he moved to Lyon in 792 and eventually succeeded Leidrad as archbishop following a period of ecclesiastical controversy. He was a prolific writer whose diverse treatises addressed theological disputes, such as Spanish Adoptionism and iconoclasm, as well as political matters involving the Frankish-Carolingian royal family. Known for his outspoken nature, he frequently challenged the authority of Emperor Louis the Pious regarding church lands and royal succession.