The Postcard Collection is an artificial collection consisting of over 800 postcards documenting the City of Hamilton and surrounding areas. The collection has been arranged by subjects into 32 series: Advertising, Aldershot, Ancaster, Bartonville, Bridges, Business & Industry, Cemeteries, Centennial Week, Dundas, Farmers' Market, Fire, Greetings, Grimsby Beach, Historic Houses, Military, Mount Hope, Parades, Parks, People, Public & Commercial Buildings, Religion, Rockton, Schools, Sports, Statues, Stoney Creek, Streets, Transportation, Views from Above, Waterdown, Waterfalls, and Waterfront.