Unashamedly gregarious and glamorous with a turbulent history to match, Mouton is the antithesis of the restrained demeanour exhibited by other first growths. It has been under the Barons de Rothschild ownership for over 100 years, and it was the unremitting efforts of the flamboyant Baron Philippe de Rothschild that resulted in the château's historical upgrade to premier cru status in 1973 – the only change ever made to the classification of 1855.
Prior to the original classification, the château's wine labels declared, Premier ne puis, Second ne daigne, Mouton suis ('First I cannot be, Second I do not deign to be, I am Mouton'). After the upgrade, the motto was changed to Premier je suis, second je fus, Mouton ne change ('First I am, second I was, Mouton does not change').
Today, the wines of Mouton tend to reflect the estate's personality – rich, seductive and opulent, and simply irresistible in truly great years.