The estate is located in the municipality of Labarde in the area Margaux in the Médoc (Haut-Médoc, Bordeaux). In the Bordeaux Classification according to the old system, which is no longer valid, it was last classified as "Cru Bourgeois Exceptionnel" in 2003. The ancient estate dates back to 1428, when a Guilhem de Siran was named as the owner. As a result, there were numerous owners, including the estate of the great-grandparents of the painter Henri de Toulouse-Lautrec (1864-1901). The estate has been owned by the Miailhe family since 1858. In 2007, William Alain and Brigitte Miailhe handed over the business they had run since 1978 to their son Edouard Miailhe, who is now the fifth generation to run it. Hubert de Bouard (oenologist), Jean-Luc Chevalier (vineyards) and Marjolaine Defrance (cellar technology) are responsible for production.
The entire property extends over 88 hectares of land. Of these, the vineyards cover 25 hectares of vines on water-permeable gravel so that the vines are one water stress exposed and need to be deeply rooted. The vineyards are very strong with 10,000 vines / hectare close planted and strong with an average of 45 to 50 hectoliters / hectare income reduced, They are the varieties typical of Bordeaux Merlot (46%), Cabernet Sauvignon (43%), Petit Verdot (10%) and Cabernet Franc (1%) cultivated. Environmentally friendly management has been carried out since 2000 ecological. sustainable Principles.
The long-lasting Margaux red wine from the above blend ratio is 12 to 14 months in one third new Barrique expanded. The second wines are called "S de Siran" (until 1998 "Château Bellegarde"; CS, ME, CF; 12 months in 10% new barrique), "Bel Air de Siran" (CS, ME; 12 months in barrique) and "Château St- Jacques ”(CS, ME, CF; 10 months in stainless steel and barrique). 130,000 to 150,000 bottles of wine are produced annually.