The Scotia Bank Arena (previously: Air Canada Centre) is home to the Toronto Maple Leafs hockey club, Toronto Raptors basketball club, and the Toronto Rock lacrosse team. The Air Canada Centre hosted its first hockey game two years after the project broke ground in February 1999. Since then, the Air Canada Centre has hosted thousands of events including concerts, sporting events, family shows, festivals, banquets, receptions, trade-shows, and business meetings. The arena site was once occupied by Canada Post's Toronto Postal Delivery Building which was briefly handed over to Department of National Defense for war storage purposes upon completion in 1941, but returned to Canada Post in 1946. You can still see the striking Art Deco façades of the east and south walls of that structure, but the rest of the building was removed to make room for the arena. The original building is protected under the Ontario Heritage Act. This arena is 665,000 square feet (61,800 square meters) in size. In 2008, the ACC was the fifth busiest arena in the world and the busiest in Canada.