  The main aim of this lecture is to give an update on the lectures on Magnetic
Monopoles (MMs) of the 1995 Trieste School. The update concerns theoretical
developments, searches for GUT monopoles in the penetrating cosmic radiation at
ever lower fluxes, study of the energy losses of MMs in the Earth and in
detectors,searches for low mass monopoles, and finally mention byproducts of MM
searches.
