The Core, which consists of TD Square, the Holt Renfrew building, the Lancaster building (Simons), the Stephen Avenue Place shops, Scotia Centre, 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 six major office towers (TD Canada Trust Tower, TD Square Home Oil and Dome Towers, 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 of the complex. As of October 29, 2010, the Core offers free evening and weekend parking at its underground lots.