Physiologus

Greek scientific text

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Last updated

July 1, 2026

Quick Summary

The Physiologus was an ancient Greek text, likely originating in Alexandria before the mid-2nd century AD. Attributed to an unknown author known as "Physiologus" (meaning "Naturalist"), it compiled descriptions of animals, plants, and stones, imbuing them with Christian allegorical meanings for moral instruction.1

The text, divided into 48 sections, linked each subject to a biblical passage. While its exact origins are unclear, it may have drawn from popular animal fables and possibly Indian influences, such as the unicorn story. The Physiologus was widely translated into numerous languages, including Latin, Ethiopian, and Arabic, and heavily influenced medieval bestiaries, which were collections of similar allegorical animal stories. Many of these stories, often based on misconceptions of natural history, have contributed to folklore and imagery still recognized today.1

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bestiary
…are derived from the Greek Physiologus, a text compiled by an unknown author before the middle of the 2nd century ad. It consists of stories based on the “facts” of natural science as accepted by someone called Physiologus (Latin: “Naturalist”), about whom nothing further is known, and from the compiler’s…
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…are derived from the Greek Physiologus, a text compiled by an unknown author before the middle of the 2nd century ad. It consists of stories based on the “facts” of natural science as accepted by someone called Physiologus (Latin: “Naturalist”), about whom nothing further is known, and from the compiler’s…
Read More

unicorn
…Greek bestiary known as the Physiologus, which states that the unicorn is a strong, fierce animal that can be caught only if a virgin maiden is placed before it. The unicorn leaps into the virgin’s lap, and she suckles it and leads it to the king’s palace. Medieval writers thus…
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…Greek bestiary known as the Physiologus, which states that the unicorn is a strong, fierce animal that can be caught only if a virgin maiden is placed before it. The unicorn leaps into the virgin’s lap, and she suckles it and leads it to the king’s palace. Medieval writers thus…
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myth
Relationships of similarity
The popular Physiologus (“Naturalist”), a Greek work from the 2nd century ce, and the medieval bestiary traditions draw morals particularly from monstrous or wondrous animals and plants. Both the fable and the bestiary traditions contributed to the formation of the stereotyped bird, beast, and flower emblems that…
Read More
The popular Physiologus (“Naturalist”), a Greek work from the 2nd century ce, and the medieval bestiary traditions draw morals particularly from monstrous or wondrous animals and plants. Both the fable and the bestiary traditions contributed to the formation of the stereotyped bird, beast, and flower emblems that…
Read More