The Institut Laue-Langevin is an international research centre at the leading edge of neutron science and technology. As the world’s flagship centre for neutron science, the ILL provides scientists with a very high flux of neutrons feeding some 40 state-of-the-art instruments, which are constantly being developed and upgraded.The ILL makes its facilities and expertise available to visiting scientists. Every year, some 1500 researchers from over 40 countries visit the ILL. More than 800 experiments selected by a scientific review committee are performed annually. Research focuses primarily on fundamental science in a variety of fields: condensed matter physics, chemistry, biology, nuclear physics and materials science, etc. Whilst some are working on engine designs, fuels, plastics and household products, others are looking at biological processes at cellular and molecular level. Still others may be elucidating the physics that could contribute to the electronic devices of the future. ILL can specially tailor its neutron beams to probe the fundamental processes that help to explain how our universe came into being, why it looks the way it does today and how it can sustain life. The ILL also collaborates closely and at different levels of confidentiality with the R&D departments of industrial enterprises.ILL is funded and managed by France, Germany and the United Kingdom, in partnership with 11 other countries (10 European and India.)The Institut Laue-Langevin is engaged in continuous modernisation programmes, such as the ILL 20/20 Upgrade Project. It is part of the institute’s wide-ranging Millennium Programme which contributes to planning for the next phase of development, called Endurance and planned for 2016 to 2021. Its purpose is to investigate infrastructure needs, together with potential methods for the optimisation of access and use of the site; it distinguishes the most cost-effective response to users’ requirements in both the short and medium term. ILL is a project on the ESFRI Roadmap of Research Infrastructures (RIs) of pan-European interest.