The Erechtheum, which is part of the acropolis in Athens. Like most temples and monuments up there, paid tribute to Athena, the goddess of the city.
First day in Athens was good. Did a lot of walking around in the sun early on, then relaxed for much of the afternoon and did another late night dinner with way too much food.
Heading out right now to pick up the tickets for the ferry tomorrow morning to Sifnos.