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Propylaea - Wikipedia
Propylaea - World History Encyclopedia
Propylaia (Acropolis of Athens) - Wikipedia
The Propylaia | Acropolis Museum | Official website
Propylaea of the Athenian Acropolis - Visit Greece
The Propylaia - History and Facts | History Hit
Propylaia - Ancient Greece
Propylaea | Oxford Classical Dictionary
Propylaia | Acropolis Area, Athens | Attractions - Lonely Planet
Athens - Acropolis, Parthenon, Ancient Greece | Britannica