Well, the title says it all. It’s a pink Wallace Fountain.
It is located on rue Jean Anouilh, between the BNF and Rue Neuve Tolbiac in the 13th Arrondissement.
Why is it pink and not dark green?
Well, when it was installed as well as a few other ones in the 13th Arrondissement, the arrondissement’s mayor wanted them to represent Paris’s tradition, but also a more contemporary Paris, just like this neighborhood. Hence the colors. This one is pink, but there also are red, orange and yellow ones in the area.