Which building in Paris is this?

Can someone who lives in or knows Paris tell me which building is this:



http://sphotos.ak.fbcdn.net/hphotos-ak-snc4/hs171.snc4/37908_1460292261476_1058495204_1325029_3265100_n.jpg



and also do you know what is the little white house that is in front of it???



Thanks,

Nikola
The building is Htel de Ville, or City Hall. The little white house is some sort of tent or temporary building (it