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Re: H Ακρόπολη των Αθηνών / H Ακρόπολη της Αθήνας
by Greg Brush - Monday, 15 November 2010, 12:11 PM
  The first version uses the ancient/classical/katharevousa name for Athens, αι Αθήναι (gen. των Αθηνών); the second uses the modern name for Athens, η Αθήνα (gen. της Αθήνας).

See "FYI: η Αθήνα" in Discussion Forum 26 for a little more about this topic.

Regards,
Greg Brush