Project Overview- The 2015 International Conference on City Sciences is in need of a promotional poster that will illustrate the key themes of the conference. The new science of cities encompasses rather different, or even conflicting, approaches. Future cities describes the modernization of urban infrastructures and services such as transport, energy, culture, etc., through digital ICT technologies: ultra-fast fixed and mobile networks, the Internet of things, smart grids, data centre, etc. This poster focuses on the theme of energy management infrastructures and applications.