Château Grand-Puy Lacoste was classified as a 5th Grand Cru Classé in the classification of Médoc wines in 1855, a rank it retains to this day. This status, obtained on the occasion of the Universal Exhibition commissioned by Napoleon III, confirms the estate's historic reputation among the great references of the Pauillac appellation. Many experts indeed consider that the current quality of the wines far surpasses what this classification might suggest.