the propylaea were the main entrance to the acropolis of athens

39aph39 acropolis ancient antique archaeology architectural architecture are athens beauty between blue building built capital cities civilization classical color column composed covered culture cultures democracy destinations entrance europe european exterior famous framework gate government greece greek heritage hill history horizontal image international landmark large made main marble material mediterranean mnesicles monument monumental old outdoors parthenon passage pentelic people pericles photography place politics program propylaea religion restoring rock ruin site sky stone style sun sunlight temple travel unesco were within world years