The fortified hill which was the core of ancient athens, containing a number of important temples such as the parthenon, as reminders of the glory of ancient greece.

The fortified hill being described here is named Acropolis.
Acropolis is one of the most recognizable and important sites in the Greek history and culture. Acropolis means the "highest city" in literal translation and the word itself is used for many other similar sites but only the Acropolis of Athens is known as The Acropolis. The most famous building here is without a doubt Parthenon.