Several schools of polyphony flourished in the period after 1100: the St. Martial school of organum, the music of which was often characterized by a swiftly moving part over a single sustained line; the Notre Dame school of polyphony, which included the composers Léonin and Pérotin, and which produced the first music for more than two parts around 1200; the musical melting-pot of Santiago de Compostela in Galicia, a pilgrimage destination and site where musicians from many traditions came together in the late Middle Ages, the music of whom survives in the Codex Calixtinus; and the English school, the music of which survives in the Worcester Fragments and the Old Hall Manuscript. Alongside these schools of sacred music a vibrant tradition of secular song developed, as exemplified in the music of the troubadours, trouvères and Minnesänger. Much of the later secular music of the early Renaissance evolved from the forms, ideas, and the musical aesthetic of the troubadours, courtly poets and itinerant musicians, whose culture was largely exterminated during the Albigensian Crusade in the early 13th century.