Temple of Hephaestus, Athens by vasiliosgavrilis

The Temple of Hephaestus or Hephaisteion or earlier as the Theseion, is a well-preserved Greek temple, it remains standing largely as built.

Hephaestus was the patron god of metal working and craftsmanship.

After the battle of Plataea, the Greeks swore never to rebuild their sanctuaries destroyed by the Persians during their invasion of Greece, but to leave them in ruins, as a perpetual reminder of the war. The Athenians directed their funds towards rebuilding their economy and strengthening their influence in the Delian League.

via http://bit.ly/1gbB7xb