King Louis XV held an open house at his Versailles estate in 1770 to showcase his new theatre. The theatre was built to stage Jean-Baptiste Lully's opera "Persée", marking the marriage of the king's grandson to Marie-Antoinette. Nearly 1,000 guests attended the inaugural performance in the oval-shaped theatre with excellent acoustics. In 2004, Opera Atelier remounted their production of "Persée" in the original Versailles setting, transporting the audience back to the theatre's opening night under Louis XV. The magical performance in the historic setting highlighted how beautiful Baroque opera remains today.