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Christ crucified from a Processional Cross, by the circle of Roger of Helmarshausen, Lower Saxony, c. 1100, cast bronze. Theophilus Presbyter (fl. c. 1070–1125) is the pseudonymous author or compiler of a Latin text containing detailed descriptions of various medieval arts, a text commonly known as the Schedula diversarum artium ("List of various arts") or De diversis artibus ("On various ...
Roger has been proposed by a number of academics (for example, Albert Ilg (1874) and C. R. Dodwell (1961)) as the real author of the important medieval treatise De diversis artibus (also Schedula diversarum artium), which is ascribed to the pseudonymous Theophilus Presbyter. [3]
De diversis artibus, compiled 1100-1120 by Theophilus Presbyter; Manasollasa composed by king Someshvara III of the Western Chalukya Empire of India. Liber Floridus, compiled in 1120 by Lambert of St. Omer; Imago mundi, treaty of cosmography and history by Honorius Augustodunensis, about 1110
Created Date: 8/30/2012 4:52:52 PM
First page of the Liber in MS H 277. The anonymous Liber diversarum arcium ('Book of various arts') is a medieval handbook of painting.It contains over 500 art-technological instructions or recipes in Latin, forming a complete structured painting course.
Theophilus Presbyter gave a long recipe in his book, the Schedula diversarum artium, for creating a compound to convert copper into "Spanish gold" (De auro hyspanico). The compound was formed by combining powdered basilisk blood, powdered human blood, red copper, and a special kind of vinegar.
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The use of the flywheel as a general mechanical device to equalize the speed of rotation is, according to the American medievalist Lynn White, recorded in the De diversibus artibus (On various arts) of the German artisan Theophilus Presbyter (ca. 1070–1125) who records applying the device in several of his machines. [3] [5]