Henri Arnaut de Zwolle (1400–1466)
Born 1400 CE, died 1466 CE.
Henri Arnaut de Zwolle (c. 1400, in Zwolle – September 6, 1466, in Paris) (often Henri Arnault, also Henricus Arnold/Arnoldus/Arnoul of/van Zwolle) was employed as a physician, astronomer, astrologer, and organist to Philip the Good. He is best known for a treatise on musical instruments. Henri Arnaut apparently was born in Zwolle, then part of the Burgundian Netherlands. There are no data on his education. Perhaps he became a physician first, as he was named Magister Henricus Arnault, Medicus Alemannus de Zuvolis (Zuvolis = Zwolle). He became a student of the instrument-maker Jean de Fusoris, who was employed between 1400 and 1445 by Philip the Good and later by the French king Louis XI. By 1432, Henri was at the court of Philip the Good in Dijon as well. Between 1438 and 1446 (several decades before the activities of Leonardo da Vinci), he created manuscripts in Latin on a wide variety of technical subjects, including astronomy, hydraulics, astronomical instruments, and drawings of apparent inventions like a folding ladder and a gem polishing machine. Among the manuscripts is a copy (in Henri's handwriting) of Jacob of Liège's Speculum musicae.
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