Andronicus of Cyrrhus

Short description: Greek astronomer

The Tower of the Winds, Athens

Andronicus of Cyrrhus or Andronicus Cyrrhestes (Latin; Greek: Ἀνδρόνικος Κυρρήστης, Andrónikos Kyrrhēstēs; fl. c. 100 BC) was a Hellenized Macedonian astronomer best known for designing the Tower of the Winds in Roman Athens.

## Contents

* 1 Life
* 2 Work
* 3 References
* 3.1 Citations
* 3.2 Bibliography
* 4 External links

## Life

Little is known about the life of Andronicus, although his father is recorded as Hermias. It is usually assumed that he came from the Cyrrhus in Macedonia rather than the one in Syria.[citation needed]

## Work

Andronicus is usually credited with the construction of the Tower of the Winds in the Roman forum at Athens around 50 BC, a considerable portion of which still exists.[1] It is octagonal, with figures of the eight principal winds (Anemoi) carved on the appropriate side.[2] Originally, a bronze figure of Triton was placed on the summit that was turned round by the wind so that the rod in his hand pointed to the correct wind direction, an idea replicated with subsequent wind vanes.[3] The interior housed a large clepsydra and there were multiple sundials on the exterior, so that it functioned as a kind of early clocktower.

He also built a multifaced sundial for the Temple of Poseidon on the island of Tinos.

## References

### Citations

1. ↑ "Andronicus of Cyrrhus | Greek astronomer" (in en). https://www.britannica.com/biography/Andronicus-of-Cyrrhus.
2. ↑ Noble & al. (1968), p. 353.
3. ↑ Chisholm (1911), p. 23.

### Bibliography

* Noble, Joseph V. et al. (1968), "The Water Clock in the Tower of the Winds", American Journal of Archaeology, 72 .

## External links

* Tenos island - Epigraphical Database - IG XII,5 891

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Ancient Greek astronomy

Astronomers|

* Aglaonice
* Agrippa
* Anaximander
* Andronicus
* Apollonius
* Aratus
* Aristarchus
* Aristyllus
* Attalus
* Autolycus
* Bion
* Callippus
* Cleomedes
* Cleostratus
* Conon
* Eratosthenes
* Euctemon
* Eudoxus
* Geminus
* Heraclides
* Hicetas
* Hipparchus
* Hippocrates of Chios
* Hypsicles
* Menelaus
* Meton
* Oenopides
* Philip of Opus
* Philolaus
* Posidonius
* Ptolemy
* Pytheas
* Seleucus
* Sosigenes of Alexandria
* Sosigenes the Peripatetic
* Strabo
* Thales
* Theodosius
* Theon of Alexandria
* Theon of Smyrna
* Timocharis

Works|

* Almagest (Ptolemy)
* On Sizes and Distances (Hipparchus)
* On the Sizes and Distances (Aristarchus)
* On the Heavens (Aristotle)

Instruments|

* Antikythera mechanism
* Armillary sphere
* Astrolabe
* Dioptra
* Equatorial ring
* Gnomon
* Mural instrument
* Triquetrum

Concepts|

* Callippic cycle
* Celestial spheres
* Circle of latitude
* Counter-Earth
* Deferent and epicycle
* Equant
* Geocentrism
* Heliocentrism
* Hipparchic cycle
* Metonic cycle
* Octaeteris
* Solstice
* Spherical Earth
* Sublunary sphere
* Zodiac

Influences|

* Babylonian astronomy
* Egyptian astronomy

Influenced|

* Medieval European science
* Indian astronomy
* Medieval Islamic astronomy

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