The city walls were breached by cannon during a siege in 1374. This is believed to have been among the first successful uses of guns against city walls in history.[4]
The arms of Saint-Sauveur-le-Vicomte are blazoned : Gules, 2 fesses, in center point a triple towered castle, all between 3 pairs of sea-bass adorsed Or.
Sister Marie-Madeleine Postel acquired the derelict Benedictine monastery at St-Sauveur-le-Vicomte in 1830 which became the headquarters of the Sisters of the Christian Schools of Mercy; in 1846 she died in the town.
Medieval knight Geoffroy d'Harcourt who fought for both the French, and the English, during the 100 years war.