At the sanctuary of Apollo at Delphi there is a retaining wall below the temple upon which the Athenians inscribed the names of those who died at the Battle of Marathon in 490 BCE. Many people walk by the wall and don’t see the inscriptions. They’re so weathered after 2500 years they’re hard to see. Those of you who know the Vietnam War Memorial in Washington DC now know where the inspiration came from: the names of the Marathonomachoi, or heroes of the Battle of Marathon.