The Propylaea of the Acropolis of Athens is the impressive entrance to the Acropolis from the west side, built during the golden age of Pericles by the architect Mnesicles. It is believed that here also stood the gate of the Mycenaean Acropolis. All previous buildings were destroyed by the Persians in 480 BC.
After the Persian wars, the buildings were reconstructed by Themistocles and Cimon. The Propylaea that we can see today belongs to the large reconstruction program that took place at the Acropolis during the Classical era, which unfortunately was interrupted by the Peloponnesian War. So the Propylaea were never completed.
The Propylaea is impressive in every respect of architecture and art, although it was not completed, Mnesicles passed into immortality along with Ictinus, Callicrates and Phidias the other architects and artists of the Acropolis. At the Propylaea of the Acropolis in a separate room was the very first gallery of the world. There were housed among others, paintings by Polygnotus.