There have been no less than 3 "entrances" used to enter the police station located aside the Seine just 925' from Notre Dame. There is no entrance on the river side of the building. Instead, facades are placed against the building. Which also explains why the camera has NEVER followed a character through the door and into the building.
Called The Paris Murders on Paramount+, a not very good translation of Profilage, particularly as not all episodes deal with murders.