Harpa Concert Hall and Conference Centre is the official home of the Iceland Symphony Orchestra and the Icelandic Opera. The new building is part of the East Harbour Project: an expansion and revitalisation of Reykjavík's eastern harbour with a new downtown plaza, a shopping street, a hotel, residential buildings, educational institutions, and mixed industry. Danish-Icelandic artist Ólafur Elíasson designed the south façade and developed the principle for the remaining north/east/west façades and roof. Elíasson deploys light, colour, and natural phenomena to test how physical movement, sensual engagement, and the interaction of body and brain influence our perception of our surroundings. In every glass block in the south side wall LED light is installed, to change the facade according to the seasons in Iceland. According to Harpa there has never been used so much LED in any construction in the world.