After World War II, Italian physicists felt the need to build accelerator machines for research purposes in the field of particles. After long discussions, two machines were built: one in Frascati - the 1000 Mev synchrotron - intended for high energy physics and one in Milan - the 45 Mev cyclotron - intended for low energy physics. While the construction of the Frascati machine was financed by the National Institute of Nuclear Physics, the Milan machine was built with local funding from companies and the Municipality of Milan.