The Third Council of Toledo (589) marks the entry of Visigothic Spain into the Catholic Church, and known for codifying the filioque clause into Western Christianity. The council also enacted restrictions on Jews, and the conversion of the country to Christianity led to repeated conflict with the Jews.
In the 4th century, the bishop Wulfila (c 310 - 383) invented a script for the Gothic language, translated the Bible into Gothic, and converted the Goths to Arian Christianity. When the Visigoths traveled west, they encountered Latin Christians, for whom Arianism was anathema. The Visigoths held to their Arian beliefs and refused to join the Catholic Church.
Prior to the Council in Toledo, King Reccared had convened informal assemblies of bishops to resolve the religious schism in his kingdom. At the second assembly both Arian and Catholic bishops presented their arguments, while Reccared pointed out that no Arian bishop had ever performed a healing miracle. The last assembly consisted of only Catholic bishops, where upon Reccared accepted the Catholic faith.
The Council was organized by Bishop Leander of Seville, who had worked tirelessly to convert the Arian Visigothic kings and had succeeded with Reccared. Abbot Eutropius had the chief day-to-day management of the council, according to the chronicler John of Biclaro. In the king's name, Leander brought together bishops and nobles in May of 589. However, King Reccared and Bishop Leander were only able to persuade eight Arian bishops to attend the council.