Picture from a 1550 edition of On the Sphere of the World, the most influential astronomy textbook of 13th-century Europe.

November 21, 2013 By

Picture from a 1550 edition of On the Sphere of the World, the most influential astronomy textbook of 13th-century Europe.

Picture from a 1550 edition of On the Sphere of the World, the most influential astronomy textbook of 13th-century Europe.

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