Casa da Música (English: House of Music) is a major concert hall space in Porto, Portugal, which houses the cultural institution of the same name with its three orchestras Orquestra Nacional do Porto, Orquestra Barroca and Remix Ensemble. It was designed by the Dutch architect Rem Koolhaas with Office for Metropolitan Architecture in association with the agency of scenography dUCKS scéno, the acoustician Renz Van Luxemburg and Arup-AFA. Intended as part of Porto's designation as the European Culture Capital in 2001, it was only finished in 2005. It immediately became an icon in the city. Featuring a 1,300-seat auditorium suffused with daylight, it is the only concert hall in the world with two walls made entirely of glass.