Catalogued

Porphyrian tree

Made by

Porphyry of Tyre (text); diagram form by medieval commentators

Year

270-1200

Field

Logic, language and computing

Kind

Concept diagram

Room

Links and trees — Placed by reading its description, not yet studied

46 other forms share this skeleton

Source

Porphyry c.270, Isagoge

Attribution less certain: contested, or no single inventor recorded

Searches, not citations

archive.orgcommons.wikimedia.orgscholar.google.com