Storage is one of the major stakes of the energetic transition: how to retain the energy we produced while maximizing its efficiency? During its research, the Paleo-energy Team realized that history is full of inventions related to energetic storage… The action of storing energy is both different and complementary to that of producing it. Storing remains a big challenge for the 21th century, while the transition to more renewable energies is more than ever necessary. That is why the Team considered it relevant to investigate more precisely the inventions related to energy storage.