The unique shape of the Endesa Pavilion is all determined by the angle and orientation of the sun during the course of a year. The façade is formed by a series of modules that are positioned to optimize the surrounding solar energy. It is constructed of wood, both to be inviting and to provide natural thermal insulation. The modules have windows to allow maximum natural light, have visors to passively protect against solar radiation in the summer months, and/or have photovoltaic panels to capture warmth to use during the winter months. Endesa Pavilion is the work of the Institute for Advanced Architecture of Catalonia (IAAC), and was placed at the Olympic Port in Barcelona last November.