Chateau Bonalgue started out life under the name of Clos Bonalgue. That name changed in 1969 to Chateau Bonalgue. Château Bonalgue (Pomerol), a 9.4 hectare (23 acre) estate at the southwestern end of the appellation, on the outskirts of Libourne, planted to 90 percent Merlot and ten percent Cabernet Franc. The vineyard has a terroir of sand, gravel, and clay with bits of iron in the soil. The estate has a long history in the Pomerol appellation. The original chateau was constructed in 1815 when it was owned by the Rabion family. The vineyard takes its name from the sector the vines are planted in, Graves de Bonalgue. Chateau Bonalgue was purchased by the Bourotte family in 1926. The Bourotte family remains the owners of Chateau Bonalgue today.