The Sillery Heritage Site () is an area containing historic residences and institutional properties located in the Sainte-FoyâÂÂSilleryâÂÂCap-Rouge borough of Quebec City, Quebec, Canada. It was the first of 13 declared heritage sites () of the Province of Quebec, and is among the four of which are located in Quebec City. Having been called the "cradle of the French Canadian nation," the heritage site includes approximately 350 buildings along of the Saint Lawrence River shoreline. The Sillery Heritage Site includes buildings constructed during every major period of Quebec's history, dating back to the time of New France.
Heritage designation began as early as 1929, when the Jesuit House was assigned protective status. The entire territory was officially recognized as a declared heritage site () by the Government of Quebec on February 5, 1964. The heritage site was listed on Parks Canada's administered Canadian Register of Historic Places (CRHP; (), also known as Canada's Historic Places, on June 22, 2006. The declared heritage site consists of five categorical groups of associated elements: 629 associated heritage immovable/real properties (including classified heritage immovable), nine associated movable heritage objects, 18 associated commemorative plaques, two associated groups (Society of Jesus and Société des prêtres du Séminaire de Québec), and three associated persons (General James Murray, Noël Brûlart de Sillery, and Jean-Antoine Panet).
While recognizing the visionary action taken by Quebec's Ministry of Culture (), in the 1960s, by conferring historic status upon the district to protect it from suburban developers, the National Trust for Canada (), a national registered charity in Canada, placed the Sillery Historic District on its Top 10 Endangered Places list (), in the early 2010s, due to the approval of condominium developments which encroached upon historic religious properties in the district. In 2015, the City of Quebec announced that it would encourage any future developers to restore historic religious structures which were no longer owned by their former communities, in exchange for the allowance to undertake development on the surrounding lands. The city argued that some development was necessary to provide tax revenue in order to sustain the preservation of the historic district. The Trust has subsequently removed the Sillery Historic District from its endangered list, and archived its status as a past listing, among other properties, spread across all of Canada's provinces and territories.
Among the district's properties are the early 18th century Jesuit House of Sillery (), 19th century workers' homes on Foulon Road ( (also known during this time period by the English language name Cove Road)) and the Sillery coast (near Saint-Michel of Sillery Church (), villas built by wood barons in the 19th century, and institutional properties built at the turn of the 20th century.