Extracted from a publication; trimmed; small edge tears.
MGG Vol. 2, cols. 675/676 (a similar image).
Calvisius, a German music theorist, composer, teacher, chronologist and astronomer, "was one of the most influential German theorists of his time and prominent in the musical and intellectual life of Leipzig... He had a wide circle of scholarly friends, including the astronomer Johannes Kepler, Michael Praetorius and the music theorists Abraham Bartolus, Henricus Baryphonus, Nikolaus Gengenbach and Johannes Lippius." Adam Adrio and Clytus Gottwald in Grove Music Online. Item #25615
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