Exhibition focuses on “objects found from Prehistory to the present day’ Under the square of Notre-Dame de Paris, the Seine delivers 150 secrets saved from the waters. The rusty helmet of a soldier from the First World War found near the Henri-IV bridge (IVth) Paleolithic flints used for butchering animals, a mammoth tusk which tells of the presence of large mammals on the banks of the river during the ice age, ex-votos, jewelry...