This was accomplished by means of a fire which blazed at the summit during the night and a mirror which reflected the sun 's rays by day . The mirror was also used to amplify the light of the fire , and was mostly likely made from a curved sheet of polished metal . Achilles Tatius likened the structure to "a mountain , almost reaching the clouds , in the middle of the sea " Soldiers or slaves - the lighthouse keepers - tended Pharos 's huge fire...











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