Château d'Armailhac is a Cinquième Cru Classé in Pauillac, under the same ownership as sister-estates Châteaux Mouton-Rothschild and Clerc-Milon.  In fact, Armailhac's vines were once part of the larger Mouton estate.  Baron Philippe Rothschild purchased the estate in 1934.  The 70 hectare vineyard is planted to 57% Cabernet Sauvignon, 21% Merlot, 20% Cabernet Franc and 2% Petit Verdot.  

If you closely a the photograph of the château, you may notice it is only half-built.  Famously, when it was constructed in 1810, the owners ran out of money and had to stop work before the right-hand side could be built.