Sillery, a former independent city founded in 1637, is one of 35 administrative sectors, which are unincorporated places, located in th…Sillery, a former independent city founded in 1637, is one of 35 administrative sectors, which are unincorporated places, located in the post-expansion jurisdiction of the City of Quebec, Quebec, Canada. Sillery was one of multiple self-governing municipalities amalgamated into a vastly expanded Quebec City, that went into legal effect on January 1, 2002, as part of the province-wide 2000–06 municipal reorganization in Quebec. Located alongside in what pre-merger was the southwestern border of Quebec City, Sillery is a constituent district of the borough of Sainte-Foy–Sillery–Cap-Rouge. The territorially expanded City of Quebec consists of six boroughs.