The Halifax Common, in local popular usage often referred to as the Commons, is a Canadian urban park in Halifax, Nova Scotia. It is Canada’s oldest urban park. The Halifax Common was originally a lightly forested swampy area which formed the source of Freshwater Brook, which flowed into Halifax Harbour near the site of today's Pier 21. Th…The Halifax Common, in local popular usage often referred to as the Commons, is a Canadian urban park in Halifax, Nova Scotia. It is Canada’s oldest urban park. The Halifax Common was originally a lightly forested swampy area which formed the source of Freshwater Brook, which flowed into Halifax Harbour near the site of today's Pier 21. The Common was designated by surveyors following the settling of Halifax in 1749. It was created to serve three purposes. The first was to provide pasturage for horses and livestock, both by the military garrison and the citizens of Halifax. The second was to create a large area in which regiments stationed and in transit through Halifax could set up camps. The third and final reason was to provide clear fields of fire for the garrison of the Halifax Citadel, so that invading forces would have no cover in the event of an assault on the fort.