Classified a fifth growth in the 1855 classification, Château d'Armailhac borders on Château Mouton Rothschild in Pauillac, and has 73 hectares of vines planted with the finest grape varieties.

In 1933, Baron Philippe de Rothschild (1902-1988)acquired the estate - also well-known for its grounds (among the most beautiful in the Medoc), front courtyard, and château- which had belonged to the Armailhacq family since the 18th century. Known as Mouton d'Armailhacq between 1956 and 1989, the château was then successively named Mouton Baron Philippe and later Mouton Baronne Philippe.

Since 1989, Baronne Philippine de Rothschild (1933-2014) has revived the historic link with the original owner by renaming the estate Château d'Armailhacq. Today, Philippe Sereys de Rothschild, Camille Sereys de Rothschild and Julien de Beaumarchais de Rothschild help maintain their ancestor' legacy and expertise.