Interpretive portrait
Euclid
c. 300 BCE
MathematicsGeometryAncient GreekAlexandrian
Worked in Alexandria and organised geometry into the Elements.
Interpretive portrait. Nothing is known of his appearance; this portrait is interpretive.
Why they still matter
The Elements set the standard for what a proof is, and held it for two thousand years.
The world they thought in
Ptolemaic Alexandria and its library.
The questions they worked on
Number and order
Is the world mathematically structured, or do we impose that?
Take this further
Ponderers is the historical layer. A rabbit hole brings the same question into what people are arguing about now.