The main stages in the development of theoretical and experimental neutrino physics will be presented. These include:

• The riddles of beta-ray spectra (1899-1920s).
  
• The formulation of the neutrino concept (1929-1937).
  
• Experimental observation of nuclei and particle decay (1930s-1950s).
  
• New theory of the 1950s and the birth of the Standard Model (SM) (1955-1967).
  
• Experimental verification of SM (1950s-1984).
  
• Search for a theory beyond SM (1980s).
  
• Experimental search for phenomena beyond SM (1980s-1990s).