Use the above search form to find sheet music for "D. João IV" that is available on Sheet Music Plus. You support this website by buying sheet music there.
John IV (D. João IV) was the king of Portugal and the Algarves from 1640 to his death.
John IV was a patron of music and the arts, and a considerably sophisticated writer on music; in addition to this, he was a composer. During his reign he collected one of the largest libraries in the world, but it was destroyed in the Lisbon earthquake of 1755. Among his writings is a defense of Palestrina, and a Defense of Modern Music (Lisbon, 1649).