Paul-Martin Gallocher de Lagalisserie (29 May 1805, Place Dauphine, Paris â 5 August 1871, Balbins, Isère) was a French engineer. He built a number of bridges in Paris and around the ÃÂle-de-France. He was the son of Martin Pierre Gallocher de Lagalisserie and Marie Delphine Théodore Ménager.