Guido of Arezzo
In the 12th century, a development in teaching and learning music in a more efficient manner had arisen. Guido of Arezzo's alleged development of the Guidonian hand, more than a hundred years after his death, allowed for musicians to label a specific joint or fingertip with the gamut (also referred to as the hexachord in the modern era). Using specific joints of the hand and fingertips transformed the way one would learn and memorize solmization syllables. Not only did the Guidonian hand become a standard use in preparing music in the 12th century, its popularity grew more widespread well into the 17th and 18th century. The knowledge and use of the Guidonian hand would allow a musician to simply transpose, identify intervals, and aid in use of notation and the creation of new music. Musicians were able to sing and memorize longer sections of music and counterpoint during performances and the amount of time spent diminished dramatically.
Guido von List
During an 11-month period of blindness in 1902, List became increasingly interested in occultism, in particular coming under the influence of the Theosophical Society, resulting in an expansion of his Wotanic beliefs to incorporate Runology and the Armanen Futharkh. The popularity of his work among the "völkisch" and nationalist communities resulted in the establishment of a List Society in 1908; attracting significant middle and upper-class support, the Society published List's writings and included an Ariosophist inner group, the High Armanen Order, over whom List presided as Grand Master.
Through these ventures he promoted the millenarian view that modern society was degenerate, but that it would be cleansed through an apocalyptic event resulting in the establishment of a new Pan-German Empire that would embrace Wotanism. Having erroneously prophesied that this empire would be established by victory for the Central Powers in World War I, List died on a visit to Berlin in 1919.