Was King James the sixth of Scotland a catholic?

King James VI of Scotland, who later became James I of England, was raised in the Protestant faith and was a key figure in the promotion of Protestantism in both Scotland and England. While he had a tolerant attitude towards Catholics and sought to unify the two faiths, he himself identified as a Protestant. His reign was marked by attempts to mediate between Catholics and Protestants, but he ultimately aligned more closely with Protestantism throughout his rule.