Andrea Valentino, writing for the BBC’s culture section, traces the enduring popularity of “La Folía,” a folk dance tune of Portuguese origin. Adapted by Arcangelo Corelli in his Violin Sonata in D minor, Op. 5, No. 12, the tune – really, just a chord progression – was taken up by numerous composers over the generations, turning up in such unlikely places as a Swedish political ballad and the “Addams Family” film soundtrack:
http://www.bbc.com/culture/story/20190726-could-la-folia-be-historys-most-enduring-tune
Letter V 