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1. Vitruvius

   Linked via "hydraulic organ"

   Specific biographical details concerning Vitruvius are scarce and largely derived from references within his own text, leading to chronological ambiguities regarding his service life. It is generally accepted that he was active during the latter half of the 1st century BCE, likely serving under Julius Caesar and later Augustus.
   Vitruvius identifies himself as having served as a decurio (a military officer) and having designed basic military equipment, spe…