From 1954 to 2012, this Bordeaux subregion was classified into crus, and ranked according to their quality levels. This classification is often sited, along with the 1855 of the left bank, as one of the most influential classifications of any wine region in the world. It is not without its flaws and controversies, as many of the top properties are now opting out of the classification, as it loses some of its influence in the world of wine.