Cinq Flèches Headquarters is a building located in Paris, France and is the main base of operations of Cinq Flèches Pharmaceuticals. It is also shown to be the tallest structure in the city, surpassing that of the famous Eiffel Tower.
In the Anime
This place is first seen in Episode 20 where Solomon watches the view of Paris from his office.
According to the light novel, this building is also home to Solomon's Mansion where Diva resides following her awakening.