What is a Cadence?

Who knew that a bunch of cloistered monks could have such a huge impact on the history of Western music?
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Images included in the episode:
Adarna, Brenda. "The back side of the Notre dame [sic] de Paris." Digital photograph. September 2006. http://commons.wikimedia.org/wiki/Fil.... Licensed under creative Commons Attribution-ShareAlike 2.5 Generic: http://creativecommons.org/licenses/b....

Atoma. "Notre Dame de Paris by night time." Digital photograph. 26 November 2006. http://commons.wikimedia.org/wiki/Fil.... Licensed under creative Commons Attribution-ShareAlike 2.5 Generic: http://creativecommons.org/licenses/b....

Bonjoch, Oliver. "Iona Abbey. Church." Digital photograph. 10 August 2010. http://commons.wikimedia.org/wiki/Fil.... Licensed under Creative Commons Attribution-Share Alike 3.0 Unported: http://creativecommons.org/licenses/b....

David, Gerard. "An Augustinian Friar Praying." Oil on oak. National Galler, The Netherlands. Circa 1450. http://commons.wikimedia.org/wiki/Fil.... Public domain.

Di Giovanni, Stefano. "The Ecstasy of St. Francis." 1437-44. Painting. Bemson collection, settignano. http://commons.wikimedia.org/wiki/Fil.... Public domain.

Drake, Ted. "Notre Dame in the morning." Digital photograph. 9 February 2008. http://www.flickr.com/photos/draket/2.... Licensed under Creative Commons Attribution 2.0 Generic: https://creativecommons.org/licenses/....
Galilea. "Kapitolinischer Pythagoras adjusted." 7 May 2005. Digital photograph. http://commons.wikimedia.org/wiki/Fil.... Licensed under Creative Commons Attribution-Share Alike 3.0 Unported: http://creativecommons.org/licenses/b....

Haussmann, Elias Gottlob. "Portrait of Johann Sebastian Bach." Oil on canvas. Private ownership of William H. Scheide, Princeton, NJ, USA. 1748. http://commons.wikimedia.org/wiki/Fil.... Public domain.

Johnson, Steven. "Notre Dame de Paris, southern view, at night in Spring 2001." Digital photograph. 2001. http://commons.wikimedia.org/wiki/Fil.... Licensed under Creative Commons Attribution-Share Alike 3.0 Unported: http://creativecommons.org/licenses/b....

Master of 1499. "Diptych with the angel Gabriel and the Virgin." Oil or tempera on wood. Late 15th - early 16th century. Gemaeldegalerie, Berlin. http://commons.wikimedia.org/wiki/Fil.... Public domain.

Mercuri, Paul. "Illustration of a man in renaissance clothing." Illustration. Originally uploaded to http://www.oldbookart.com/2012/01/15/.... Obtained from http://commons.wikimedia.org/wiki/Fil.... Public domain.

Mercuri, Paul. "Illustration of a man in renaissance clothing." Illustration. Originally uploaded to http://www.oldbookart.com/2012/01/15/.... Obtained from http://commons.wikimedia.org/wiki/Fil.... Public domain.

MrPanyGoff. "Opeth - Kavarna Rock Fest." Digital photograph. 16 July 2011. http://commons.wikimedia.org/wiki/Fil.... Licensed under Creative Commons Attribution-Share Alike 3.0 Unported: http://creativecommons.org/licenses/b....

redwolf518stock. "A. Tudyk Texture Stock." Digital photograph. 9 August 2011. http://redwolf518stock.deviantart.com.... Licensed under Creative Commons Attribution-Share Alike 3.0 Unported: http://creativecommons.org/licenses/b....

Unknown author. "Graduale Aboense." Hymn book. Turku, Finland. 14th - 15th century. http://commons.wikimedia.org/wiki/Fil.... Public domain.

Umbricht, Alexander. "Notre Dame de Paris by day." Digital photograph. 3 October 2003. http://commons.wikimedia.org/wiki/Fil.... Public domain.

Varlan, Horia. "White clouds on a bright blue summer sky." Digital photograph. 6 July 2008. https://www.flickr.com/photos/horiava.... Licensed under Creative Commons Attribution 2.0 Generic: https://creativecommons.org/licenses/....

All music in the episode was written and performed by its creator Stephen Johnson.