Saint Leander was a prominent bishop of Seville in the 6th century. He played a crucial role in the conversion of the Visigoths from Arianism to Catholicism. Leander was known for his strong leadership and dedication to the Christian faith, which helped unify the church in Spain during a time of religious conflict. He is often credited with the education of his brother, Saint Isidore of Seville, who became a significant theologian and scholar. Saint Leander's feast day is celebrated on March 13, and he is recognized as a patron saint of Spain and Seville. His contributions to the church have left a lasting legacy in the region.