Hermann of Reichenau
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Blessed Hermann of Reichenau or Herman the Cripple, also known by other names, was an 11th-century Benedictine monk and scholar. He composed works on history, music theory, mathematics, and astronomy,
Hermann Reichenau Ofenkachel
Relics of Hermann in Altshausen, Germany
Astrolabe
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An astrolabe is an astronomical instrument dating to ancient times. It serves as a star chart and physical model of the visible half-dome of the sky. Its various functions also make it an elaborate in
Hermann of Reichenau
…treatise on the science of music, several works on geometry and arithmetics, and astronomical treatises including instructions for the construction of an astrolabe which caused him to sometimes be credited as its inventor. As an historian, he wrote a detailed chronicle from the birth of Christ to his own present…
North African, 9th century ce, planispheric astrolabe. Khalili Collection.
A modern astrolabe made in 2013, in Tabriz, Iran.
16th-century woodcut of the measurement of a building's height with an astrolabe
A modern reconstruction of the spherical astrolabe of Ptolemy, 2nd C.E., in Kotsanas Museum of Ancient Greek Technology, Athens.