
1) Inscription at Delphi
Found on
https://www.crosswordclues.com/clue/know-thyself

The Ancient Greek aphorism `know thyself` (Greek: γνῶθι σεαυτόν, transliterated: gnōthi seauton; also ... σαυτόν … sauton with the ε contracted), is one of the Delphic maxims and was inscribed in the pronaos (forecourt) of the Temple of Apollo at Delphi according to the Greek periegetic (travelogue) writer Pausanias (10.24.....
Found on
http://en.wikipedia.org/wiki/Know_thyself
No exact match found.