The Copenhagen Opera House, also known as Operaen, is a modern opera house located in the heart of Copenhagen, Denmark. It is situated on the island of Holmen, a former naval base, and was designed by Danish architect Henning Larsen.

The Opera House opened in 2005 and has quickly become a landmark of the city. It is known for its contemporary design, featuring a large glass facade that provides views of the harbor and the surrounding cityscape. The building is also characterized by its dramatic and angular roof, which is covered with polished aluminum.

The interior of the Opera House is equally impressive, with its grand foyer, ornate chandeliers, and large auditorium. The auditorium has a seating capacity of over 1,700 and features state-of-the-art acoustics and lighting.

The Copenhagen Opera House is home to the Royal Danish Opera and the Royal Danish Ballet. It offers a diverse program of performances, including operas, ballets, concerts, and other cultural events. The Opera House has played host to some of the most prestigious performers in the world, including Plácido Domingo, Anna Netrebko, and Roberto Alagna.

The building also has several restaurants and bars, offering visitors a range of dining and entertainment options. Additionally, the Opera House offers guided tours of the building, providing visitors with an inside look at its history and architecture.