Saint-Michel - Notre-Dame is a station of the Paris RER, serving Line B and Line C. It is named after the nearby St-Michel area and Notre Dame cathedral.
The main entrance to the station is in Place Saint-Michel on the left bank of the Seine. There is also a satellite entrance to the platforms of Line B on Place Notre Dame, which is on the Île de la Cité across the Seine from Place Saint-Michel. The platforms of Line B are underneath the Seine and pass at right-angles under the Line C platforms.
On July 25, 1995, the station fell victim to a terrorist attack, with a gas bottle exploding near one of the platforms. 8 were killed and 80 wounded. See 1995 Islamist terror bombings in France.