The fortified 'upper citadel' of a Greek city. Generally it refers to the Acropolis at Athens which was the core of the original city and became, in the classical period, devoted entirely to cult and temples.
Above left: Aerial view of the Acropolis at Athens. © Raymond V. Schoder, S. J. Licence Plate 11 UK 1007 105
Above right: Map of Ancient Athens showing the site of the Acropolis. © Beazley Archive, Ian Hiley