Title: Music and ritual at Charlemagne's Marienkirche in Aachen
Subjects: Liturgy, Music, History and criticism, Church music, Catholic Church, History, Kirchenmusik
Places: Aachen, Aachen (Germany), Germany
People: Charlemagne Emperor (742-814), Frederick I Holy Roman Emperor (ca. 1123-1190), Charles IV Holy Roman Emperor (1316-1378)