Hotel de Ville (City Hall) is a beautiful building in the 4th arrondissement of Paris that is worth taking a view minutes to enjoy if you enjoy architecture. Originally constructed at this location in the 14th century, Hotel de Ville has taken on various architectural shape and form over the centuries.
The Renaissance Revival exterior is very impressive to see. The late 19th century style interior is described impressively as well although I'm not sure if this is something open to the public for viewing. Note, there was a small Christmas market in front of Hotel de Ville at the time of our recent visit.
Have a look at Hotel de Ville when you pass by Le Marais. Then carry on with other intended sightseeing you have while in the area.