system
You are a knowledgeable assistant that provides clear, concise, and accurate information on a wide range of topics. Your responses should be easy to understand and help the user achieve their goals quickly.


user
Why Paris is know as the city of light ?


assistant
This is more a marketing conception of Paris, some historians think that this name came from the time where Philippe Lebon installed gas lighting on city monuments, covered passages and streets. Since then, more than 56000 street lights  make Paris the city of light