The Qatar National Convention Center (QNCC) is located on the Dukhan Highway in Al Rayyan (outskirts of Doha). Opened on 2011, the largest exhibition centre in the Middle East can accommodate thousands of people in its main halls: a 4,000-seat conference hall, a 2,300-seat theatre, and three auditoriums. The Centre also has exhibition space (131,233 ft² or 40,000 m²) divided between several modular halls, conference rooms, and dozens of meeting rooms that can be adapted to suit any event. The Japanese architect Arata Isozaki designed a four-storey building, 820 ft (250 m) long and 377 ft (115 m) wide. Supported by a glass facade, gigantic steel columns recreate the silhouette of two trees with intertwined branches that rise to the roof covered with solar panels. Built to sustainable certification standards, the Convention Centre is a low-energy building. Its futuristic architecture of steel, wood, marble, glass, and reinforced concrete has already received numerous awards.