Carcassonne http://www.ab-real-estate.com/towns/carcassonne.php
Since the pre-Roman period, a fortified settlement has existed on the hill where Carcassonne now stands. In its present form it is an outstanding example of a medieval fortified town, with its massive defences encircling the castle and the surrounding buildings, its streets and its fine Gothic cathedral. http://whc.unesco.org/en/list/345
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