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Calvinism is a Protestant branch of Christianity that was founded by John Calvin in the 16th century. Calvinism emphasizes the sovereignty of God, predestination, and the doctrine of salvation by faith alone. Jeanne D'Albret was a Calvinist who ruled Navarre from 1555 to 1572. She was a strong advocate for the Reformation and worked to introduce Calvinism into Navarre. She was also a patron of the arts and literature.