Watch HDToday. The amazing and epic story of how the Paris Opera House, the Palais Garnier, was built from 1852 to 1870, thanks to the decisive impulse of the French Emperor Napoleon III; a story that is also that of the birth of a golden age for orchestral music, opera and ballet; of the rise of the urban bourgeoisie turned social elite; and of a certain mysterious inhabitant of the darkest corners of a legendary place.