John IV (Portugal)

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John IV, King of Portugal [ João IV] (b Villa-Viøsa, 1603; d Lisbon, 1656). Patron of music and composer of church music such as well-known Crux fidelis. Wrote defence of ‘modern music’ 1649. His magnificent library of church mus. was destroyed in Lisbon earthquake 1755.

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John IV (1605–56) King of Portugal (1640–56). As Duke of Braganza, he was a leader of the Portuguese revolt against Spanish rule (1640) and afterwards became king. Portuguese independence was confirmed by victory at Montijo (1644).