The LHC Supercollider

The LHC is the last of a series of projects making use of superconductivity to investigate the composition of matter in details as fine as 10$^{-19}$ m. Based on the performance of about 1750 large superconducting magnets it presents a numbers of technological challenges, of which the most striking is may be the construction of the 1232 15 m-long dipoles that will fill 2/3 of the 27 km long tunnel. The paper will review the main characteristics of supercolliders and of superconducting magnets for accelerators and will describe the main issue of the LHC dipoles. The construction of the accelerator is progressing well and installation has started.