ancien régime (ahn-SYAWN΄-ray-ZHEEM΄)

              The term ancien régime, ‘old rule,’ in French, refers to the political and social system in France before the Revolution of 1789.

               In a design sense, the term refers to the decorative styles used by the French courts and aristocracy, most notably during the reigns of Louis XIV (Baroque), Louis XV (Rococo), and Louis XVI (Neoclassical).

     While each of these styles is unique, they all make use of the finest materials and craftsmanship.

     Here's how design magazines use the term ancien régime:

     “The First Empire was a virile moment in French decor, when the froufrou and pastels of the ancien régime surrendered to the martial style of an age whose hunger for grandeur coexisted with a penchant for severity.” (Architectural Digest, September 2011) 

     And here's how to drop the term into conversation:

     "As you know, Doris and I collect 18^th-century French furniture.  None of that modern stuff for us!  If it isn’t ancien régime, we won’t look twice at it."

The Palace of Versailles is the epitome of  ancien régime style.
Seen here is the Hall of Mirrors.