Taylor, T 2001 2001 The Large Hadron Collider (LHC) presently under construction at CERN relies on superconducting technology both for the complex magnet system and the radio frequency accelerating structure. The technologies adopted for these systems are described. Lebrun, P 2001 2001 The Large Hadron Collider (LHC) will be the next particle accelerator built to serve the world's high-energy physics community at CERN, the European Organisation for Nuclear Research. Reusing the 26.7-km circumference tunnel and infrastructure of the existing LEP collider, the LHC will make use of advanced technology - high-field superconducting magnets operated in superfluid helium - to push the energy frontier up by an order of magnitude, while remaining economically feasible. The LHC demonstrates on a grand scale several typical features of megascience projects, such as the need for international funding, world-wide co-operation and integration in the local environment, which we review in the following.