This document discusses several important figures and concepts from ancient Greek civilization. It mentions that Pythagoras formulated the Pythagorean theorem, that he is considered the father of geometry. It also discusses the three styles of columns in Greek architecture - Doric, Ionic, and Corinthian. Greek sculptures depicted subjects realistically and highlighted human beauty, using marble and copper. Hippocrates was considered the father of medicine as he viewed disease as having natural rather than supernatural causes.