The system of astronomy commonly accepted by medieval scholars was that devised by Ptolemy, a second century mathematician. According to his theory, the earth existed motionless at the center of the universe while around it revolved 10 skies- one for each

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The system of astronomy commonly accepted by medieval scholars was that devised by Ptolemy, a second century mathematician. According to his theory, the earth existed motionless at the center of the universe while around it revolved 10 skies- one for each of the seven planets, the firmament, and two crystalline heavens. In the theological-astronomical diagram two angels are shown working the handles that turn the first revolving sky.

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Keywords: 14th, angels, artwork, astronomical, century, diagram, drawing, heliocentricism, heliocentrism, historical, history, manuscript, medieval, model, provencal, ptolemy, revolving, sky, theological, theological-astronomical