Changes To The Classification
Within each category, the various châteaux are ranked in order of quality and only twice since the 1855 classification has there been a change, first when in 1856 Cantemerle was added as a fifth growth (having either been originally omitted by oversight or added as an afterthought, depending on which of the conflicting accounts is correct) and, more significantly, in 1973, when Château Mouton Rothschild was elevated from a second growth to a first growth vineyard after decades of intense lobbying by the powerful Philippe de Rothschild. A third, but less known "change", is the removal of Château Dubignon, a third growth from Margaux that was absorbed into the estate Château Malescot St. Exupéry.
A superficial change is that since 1855, when only five of the estates were styled with the word "château" in their name, most Bordeaux wine estates now use this nomenclature.
Read more about this topic: Bordeaux Wine Official Classification Of 1855