587, c. January, 26
Reccared I, Visigothic King of Hispania, privately converts to Catholicism from Arianism c. January 26, 587. He went on to publicly announce his renunciation of Arianism, circa 587–589. Formalizing his conversion in May 589 at the Council Of Toledo where the king, his queen Baddo, and 72 bishops officially accepted the Nicene Creed. leading to the conversion of the Visigothic nobility.
The King and nobility conversion unified the Germanic Visigothic ruling class with the Hispano-Roman Catholic majority, effectively ending the religious divide within the kingdom. It also marked the introduction of the Filioque clause into the Nicene Creed, a theological change that would later contribute to the Great Schism of 1054
