On September 14th 1428, Guilhem de Siran swore a feudal oath in the church of Macau to the Abbot of Sainte-Croix de Bordeaux, to whom the parish was attached.
At the end of the 17th century, the estate was already producing wine and was to enjoy a fine reputation in the 18th century, at a time when the Miailhe family settled in Bordeaux as wine brokers, a title granted to them by royal concession.
It was in the 19th century, on the 14th January 1859 to be exact, that the Château was acquired by the actual family. Their ancestor, Léo Barbier, bought the estate for 100,000 francs from the Count and Countess de Toulouse-Lautrec, the great grandparents of the famous painter, Henri de Toulouse-Lautrec.
Ever since that time, generations of the same family have succeeded each other in a spirit of respect for the family wine-growing tradition.
In 2007, the 7th generation of the family, in the person of Edouard Miailhe, took over the management of the estate.
Château Siran is one of the very rare Bordeaux wine estates to have belonged to the same family for over 150 years.