The Stopera is a building complex in Amsterdam, Netherlands, housing both the city hall of Amsterdam and the Muziektheater, the principal opera house in Amsterdam that is home of De Nederlandse Opera, Het Nationale Ballet, and the Holland Symfonia. The name "Stopera" is a portmanteau of stadhuis (Dutch: "city hall") and opera. The Stopera at night The Stopera is located in the center of Amsterdam at a bend of the Amstel River between Waterlooplein Square and the Zwanenburgwal Canal, on a plot of land called Vlooienburg, which was reclaimed in the 16th century. The opera house building is shaped like a huge, massive block, with a curved front facing the city. Its facade is covered in a red-orange brick and corrugated metal panels. The curved face of the theatre is faced with white marble punctuated by large windows that provide panoramic views of the river from the curved interior foyers and multi-level terraces.