The document summarizes the key architectural structures located on the Acropolis of Athens. It describes the Propylaea, the monumental entrance gate to the Acropolis built between 437-432 BCE. It then discusses the small Temple of Athena Nike, built in 420 BCE in the Ionic order. The most prominent structure, the Parthenon, is then covered - a Doric temple built between 447-438 BCE dedicated to Athena. Finally, it summarizes the Erechtheum, an unusual Ionic temple with a prominent Porch of the Maidens built between 421-406 BCE and dedicated to both Athena and Poseidon.