Propylaea of the Acropolis belongs to the years before the Common Era — dated here to c. 437 BCE at Athens. The date is a scholarly centre of gravity, not a foundation-stone timestamp.
Mnesicles designed a gateway that is itself a temple-complex: Doric outside, Ionic inside, controlling how you first see the Parthenon.
How it was made
Unfinished wings and a picture gallery (Pinakotheke). Marble steps were a ceremonial machine.
Why it still counts as a wonder
It never needed a Greek list to be a wonder: the labour, the alignment, or the survival is enough.
It is the most elegant checkpoint ever built — a wonder of approach.
On dating
BCE in this series means years before the traditional birth of Christ, counted backward. A monument listed as c. 437 BCE may have been founded earlier, rebuilt later, or famous only in one phase. Where ancient writers disagree — as they do for Babylon’s gardens — we say so.
This is story 54 of 100 in The Trend Ledger’s illustrated desk on world wonders raised before the Common Era.