The urban renewal that made today's Paris

Haussman was the guy who between 1853-70 led the transformation of beat-up, run down Paris into the city of lights and public spaces that we see today. Public streets and spaces were illuminated at night by gaslights and it became the City of Light. He also gave Paris the radial grid street pattern shown below.

Haussman's Paris Renovation in Under 3 minutes
https://www.youtube.com/watch?v=q-_mVRG2IDI