The Temple of Apollo, Delphi, Greece, 2017.10.18
The Temple of Apollo, Delphi, Greece, 2017.10.18.
iPhone 7, all auto.

"Inside was the adyton, the centre of the Delphic oracle and seat of Pythia. The temple had the statement "Know thyself", one of the Delphic maxims, carved into it (and some modern Greek writers say the rest were carved into it), and the maxims were attributed to Apollo and given through the oracle and/or the Seven Sages of Greece ("know thyself" perhaps also being attributed to other famous philosophers)."

— "Delphi: The Temple of Apollo", Wikipedia