© 2016 Mikkel Kristiansen. Dette værk er under en Creative Commons Navngivelse 4.0 International licens. Besøg http://creativecommons.org/licenses/by/4.0/ for at se en kopi af licensen. Eksternt materiale i form af linkede artikler, opgaver o.lign, se de respektive sider for deres ophavrettigheder.
By Xvlun - Own work, CC BY-SA 2.5, Link
Public Domain, Link
By Hartker of Sankt-Gallen. See this book for information on the manuscript. - Antiphonary of Hartker of the monastery of Saint Gall (Cod. Sang. 390, p. 13), Public Domain, Link
By Martial d'Auvergne - Vigiles du roi Charles VII, Public Domain, Link