We have been featuring different proposals for the Musée National des Beaux Arts du Québec competition including Saucier + Perrotte‘s proposal and the winning proposal by OMA. BIG, who teamed with Fugere Architectes, just shared their proposal for the expansion with us. The design includes a grand green roof that, although it seems to slope at quite a precarious angle, is accessible for people to walk on. The sweeping form surrounds two large facades that reveal the changing exhibitions inside the museum. These massive windows also flood the interior with daylight. As the two facades rise opposite each other, the roof lines connect to the ground and continue the existing park onto the actual building.