The Core Shopping Centre (styled as CORE), which consists of TD Square, the Holt Renfrew building, and the former Calgary Eaton Centre, is the dominant shopping complex located in the downtown core of Calgary, Alberta, Canada. It spans three city blocks and contains approximately 160 retailers on four levels. The property also contains four major office towers (TD Canada Trust Tower, Home Oil Tower, Dome Tower) and the historic Lancaster Building. It is the hub of downtown Calgary’s +15 skywalk system, and as such is the busiest shopping centre in the City by pedestrian count, with around 250,000 visitors passing through each week. The centre's architectural focal point is a vast suspended glass skylight which spans the length complex.