Carcassonne est une commune française, préfecture du département de l'Aude dans la région Occitanie.. Au dernier recensement de 2015, la commune comptait 45 941 habitants appelés les Carcassonnais.

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The Trencavel were an important noble family in Languedoc during the 10th through 13th centuries. The name "Trencavel," originally a nickname and later a family name, may derive from the Occitan words for "nutcracker" (trenca avelana).

Geography. Carcassonne is located in the south of France, about 80 kilometres east from the city of Toulouse.Its strategic location between the Atlantic Ocean and the Mediterranean Sea has been known since the neolithic era.