The King’s Opera House is a spectacular theatre located within the Palace of Versailles. Built in 1682, it was designed by Jules Hardouin-Mansart and Louis Le Vau to serve as the royal opera house for Louis XIV. It is one of the oldest surviving theatres in Europe and was used primarily for court entertainments such as plays, operas, ballets, and concerts. The building features an ornate exterior with two main levels: a lower level with an entrance hall and large auditorium space, and an upper level with a small balcony overlooking the stage area. The interior design incorporates lavish Baroque décor including painted ceiling panels depicting mythological scenes. The theatre has been restored several times over the years but still retains its original layout and structure.