Telescopes are often seen as the pinnacle of modern Western science, starting with Galileo but could the ancient Greeks have used something similar? While it remains uncertain, some evidence suggests that ancient civilizations, including the Greeks, may have used rudimentary methods to view the stars.
The debate on ancient optical knowledge
People often debate the idea that ancient civilizations had advanced optical knowledge. Many modern scholars dismiss the idea that the ancient Greeks had microscopes or telescopes. They attribute these innovations only to the Renaissance. However, historical texts, like those referenced by Dr. William Drummond in The Classical Journal (1820), challenge this view.
Archeological discoveries also show that ancient peoples may have understood optics in a more advanced way than is commonly believed. Writings by Byzantine scholars, as well as archaeological finds of lenses, provide evidence of early optical experimentation.
Byzantine scholar Manuel Moscopulos’ observations
Byzantine scholar Manuel Moscopulus mentions several optical devices in his works. He lists:
“A mirror, a concave mirror, a convex mirror, and a double-convex lens. A mirror and a concave mirror are what we call a katoptron and an enoptron. A convex mirror is what we call a phanarion. As for the double-convex lens, it is an instrument used by astronomers, known as an astrolabe.”
Though the exact nature of these devices is unclear, Moscopulos’ descriptions provide evidence that ancient scholars understood different lens curvatures. He mentions that astronomers used double-convex lenses, raising the question of whether they experimented with rudimentary telescopic technology.
Zosimus of Panopolis and glass manipulation
Zosimus of Panopolis was a Greek-Egyptian alchemist who wrote in the 3rd century CE. He described the preparation of glass instruments for chemical experiments:
“Zosimus advises his students to prepare a glass vessel, a clay tube, a plate (perhaps a kettle), and a vase with a narrow mouth. Further, he instructs that large thick glass vessels should be placed over the tubes so that they do not break from the heat of the water.”
Though his focus was on alchemy, Zosimus’ description shows an understanding of controlled heating and glass manipulation. These skills would have been essential for making lenses and other optical devices.
Archeological evidence of ancient optical technology
Archeological discoveries support the idea that ancient civilizations used optical technology. One notable find is the “Nimrud lens,” or Layard lens. Researchers discovered it in the ruins of the Assyrian city of Nimrud, dating it to the 8th century BCE. This convex rock crystal artifact could have served for magnification or as an optical component.
Researchers have found other lenses in ancient Greek and Roman sites. According to George Sines and Yannis A. Sakellarakis in their work “Lenses in Antiquity” (1987): “There are now 23 ancient lenses on display in the Archaeological Museum at Herakleion, and many more are in storage there. The use of lenses [in antiquity] was widespread throughout the Middle East and the Mediterranean basin over several millennia,” they conclude, “[and] the quality of some of these lenses was sufficient to permit their use as magnifying glasses.”
These artifacts show us that ancient artisans understood the basic principles of light refraction. Further finds, such as Egyptian polished crystal and Mesopotamian lenses, reinforce the idea that ancient civilizations experimented with optical materials.
Lucian of Samosata and early concepts of magnification
Lucian of Samosata was a second-century CE satirist. In his work True History, he describes a fictional journey to the moon. During this journey, they use an enormous “glass” to observe Earth in great detail. While this is a fantastical account, Lucian’s description shows that intellectual circles were familiar with optical magnification.
Similarly, Pliny the Elder, in his Natural History, mentions Emperor Nero using emeralds to view gladiatorial games. This could refer to early lenses used for vision correction or magnification.
The lost knowledge of optics
If ancient civilizations had rudimentary telescopes, why did this knowledge disappear? One possibility is that an elite group, such as priests or astronomers, reserved optical instruments. They may have used these devices solely for religious or ceremonial purposes. Another possibility is that, while people used lenses for magnification, they never explored their full potential in astronomy. Unlike other fields like mathematics and engineering, optical science might have remained an experimental curiosity rather than a systematic study.
Although definitive proof of ancient Greek telescopes is still lacking, textual evidence, archeological findings, and logical inference suggest that ancient civilizations knew more about optics than we realize. The discovery of lenses, references in ancient texts, and mentions of astronomical instruments all point to a forgotten aspect of ancient science. Further research into these artifacts and writings could reveal even more about the lost technological capabilities of our ancestors.
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