“The particle accelerator can also be considered the most complex, sophisticated, and magnificent machine that the human mind has ever designed and built. There are other great constructions that are part of human heritage, such as the temples, the pyramids in Egypt, the temples of Angkor in Cambodia or the Great Wall in China. They are all sets of stones, often beautifully carved, is true, but inert and immobile, which will eventually erode over time. The accelerator is a machine that is working, usually running day and night for years, with impeccable reliability and chronometric repeatability. This requires the involvement of many engineering disciplines at the highest level, in addition to some of the more abstract physics”.