Anne Hidalgo's tenure as mayor is coming to an end.
The French Socialist party has been in power for 25 years.
Main contenders in the upcoming election are emerging.
Briefing: Paris mayoral race: Can the left hold on to the French capital?
Strategic angle: Paris gears up to turn the page after 12 years of Anne Hidalgo. Can the French Socialist party retain control of City Hall after ruling the city for 25 years?