Bastille Day is the French National Day, formally called La Fête Nationale (The National Celebration), and commemorates the 1790 Fête de la Fédération, held on the first anniversary of the storming of the Bastille on 14 July 1789.
Marianne is a national emblem of France and an allegory of Liberty and Reason. She represents France as a state and its values. She has been depicted in paintings and statues, often wearing a Phrygian (aka Liberty) Cap, and has appeared on many coins and stamps, somewhat akin to Lady Liberty in the USA. This first photo is from Luxembourg Palace, and the second photo is a statue in the Place de la Republique.
When I acquired the figure below (5 in) of Marianne holding a flag, it was a statue, not a bell, but a bell waiting to happen. The clapper is the end of a brass drawer pull, with an inset 19C Centime coin with the figure of Marianne.