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Upper Pergase or Pergase Kathyperthen (Ancient Greek: Περγασή καθύπερθεν) was a deme in ancient Attica of the phyle of Erechtheis.[1]
Its site is located near modern Chelidonou.[2][3]
38°05′50″N 23°47′23″E / 38.097335°N 23.789785°E / 38.097335; 23.789785