Using the sources we had to dig deep and try to build historically valid hypotheses about which period of History it was and what clues the source contained.  Many of us quickly worked out it was the Ancient Greeks and we had some super hypotheses:

* "I think it is a building in Athens because it looked like the columns they used in their buildings."

* "I think this was their parliament because they invented democracy."

* "They  must have worshipped many Gods."

* "Their Gods were important to them if they made a sacrifice for them."

* "I think it shows a Grand Temple and it is high up on the hill to be closer to the Gods."