National Geographic : 1956 Oct
© National Geographic Society 431 Castle of Chillon on Lake of Geneva Covers a Dungeon Dark and Dank Bronze Age men inhabited the rocky island, and Caesar's legions fortified it. Peter II of Savoy built this structure in the 13th century. Lord Byron, a visitor in 1816, immortalized the castle with his poem, "The Prisoner of Chillon." "A double dungeon wall and wave have made," the poet wrote, "and like a living grave ... the dark vault lies wherein we lay ... and I have felt the winter's spray wash through the bars when winds were high."