Paris 1900. The turn of the century comes with numerous changes. Scientists, philosophers, artists, or psychoanalysts like Einstein, Freud, Marie Curie, or Kandinsky develop a completely new view of the world and replace old theories.
The 20th century as we know it arises in the years before 1914. People get mobile. Henry Ford invents the assembly line and cars become available for the masses. Regulated working hours create something called spare time.
The leisure industry booms, cinema popularity grows, debates arise on sexuality and common people go on holidays. Public transport carries masses to work. Seaside resorts, department stores, and entertainment are inventions of this era.