Everything about Torquetum totally explained
The
torquetum or turquet is a medieval
astronomical instrument designed to take and convert measurements made in three sets of coordinates: Horizon, equatorial, and ecliptic. In a sense, the Torquetum is an
analog computer.
The first
torqueta is thought to have been built by
Khajeh Nasir-o-Din Tousi in the 12th century or 13th century, though the only surviving examples date from the 16th century.
A
torquetum can be seen in the famous portrait
The Ambassadors (1533) by
Hans Holbein the Younger. It is placed on the right side of the table, next to and above the elbow of the ambassador clad in a long brown coat or robe. The painting shows much of the details of the inscriptions on the disk and half disk, which make up the top of this particular kind of Torquetum.
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