The Opéra de Monte-Carlo (Salle Garnier) is an opera house in Monaco. It was built in the 1870s by Prince Charles III of Monaco and the Société des bains de mer de Monaco. Building was directed by the architect Charles Garnier, who also designed the Palais Garnier in Paris. The Monaco opera house is an exact miniature of the Paris Opera House. It seats 524. It is in Belle Epoque style. It opened on 25 January 1879. The house was renovated in 2004-5.