The Lord of Caboet or Lord Arnau de Caboet^[1] was a Catalan nobleman. He played an influential role^{[peacock prose]} in the creation of Andorra, which was established by Charlemagne as one of the buffer states that kept the Moors from invading France.^{[2][unreliable source?]} In the 11th century, an account cited how the lord protected the Bishop of Urgel from military action conducted by neighboring lords through a defensive agreement.^{[1][clarification needed]} The title^[clarify] was fought over by the Bishop of Urgell and the Count of Foix, who became the heir of Lord Caboet through marriage.^[2] The lord's family later merged with the house of Castellbo with the marriage between Viscount Arnau de Castellbo and the lord's descendant Arnaua de Caboet.^[3]

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