Saint-Michel Gate - Saint-Michel Bridge

The Grotto Boulevard was built by the Sanctuary chaplains, in collaboration with the State, to connect directly the train station to Saint-Michel Gate, the main access to the Sanctuary.
Saint-Michel Bridge was built by the architect Edouard Harlé (1850–1922). The works began in 1877 and took into account the devastating water flow of June 13, 1875 and they ended 1881.