The most remarkable thing about St. Genevieve, a 5th century Parisian who became a nun at age 15, is the ways in which she stood up to defend and help the people of Paris in difficult times. When Childeric, King of the Franks, besieged Paris in 464, Genevieve traveled by boat to Troyens to get grain for the Parisians. (It's for that reason she's often depicted holding a loaf of bread, as above.)
Later when Childeric's son Clovis I was king, at Genevieve's urging Clovis agreed to liberate may captives and treated lawbreakers more justly. (Clovis's wife would eventually convince him to convert to Catholicism; they were buried in the Abbey of St. Genevieve.)
The story also goes, when Attila the Hun's forces were headed towards Paris she called on Parisians to join her in prayer rather than flee. Not what we might call the most practical of choices. And yet, in the end the Hun turned to Orleans instead.
Today Genevieve is the patron saint of Paris and disasters. (And definitely not Orleans.)