The Casa da Musica in Porto, Portugal, by the Dutch architect Rem Koolhaas (2005) is unique among concert halls in having two walls made entirely of glass. Nicolai Ouroussoff, architecture critic from "The New York Times", wrote "The building's chiseled concrete form, resting on a carpet of polished stone, suggests a bomb about to explode. He declared that in its originality it was one of the most important concert halls built in the last 100 years". ranking with the Walt Disney Concert Hall, in Los Angeles, and the Berliner Philharmonie.