House of La Tour d'Auvergne

La Tour d'Auvergne was a noble French dynasty. Its senior branch, extinct in 1501, held two of the last large fiefs acquired by the French crown, the counties of Auvergne and Boulogne, for about half a century. Its cadet branch, extinct in 1802, ruled the duchy of Bouillon in the Southern Netherlands from 1594, and held the dukedoms of Albret and Château-Thierry in the peerage of France since 1660. The name was also borne by Philippe d'Auvergne, an alleged collateral of the original Counts of Auvergne, and was adopted by the famous soldier Théophile Corret de la Tour d'Auvergne, who descended from an illegitimate line of the family.

Although various La Tours are mentioned in the documents from the 11th and 12th century, the family history remains unclear until the 13th century, when they owned the lordship of la Tour in the county of Auvergne, hence the name.

The medieval family was related through marriages to other notable families of the French south, including Ventadour, La Rochefoucauld, and Levis-Mirepoix.

The la Tours d'Auvergne maintained close ties with the Avignon popes, and many of them became bishops and cardinals, particularly after 1352, when Guy de la Tour married Marthe Rogier of Beaufort, Popes Gregory XI's niece and Clement VI's grand niece. Their son Bertrand IV of la Tour () (1375–1423) married a rich heiress, Marie I, Countess of Auvergne, in 1389, with their son Bertrand V de la Tour () succeeding as Count of Auvergne and Boulogne in 1437.

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