Marché Port Royal Boulevard de Port-Royal, in front of Hôpital du Val de Grâce (Metro: Port-Royal) RER B The Marché Port Royal is located across from Hôpital du Val de Grâce.  Take the Exit via the escalator and turn left on Boulevard de Port-Royal to the market. It’s a small market with 16 stalls, but there are two Hospitals in the area and an intersection sojourn. The other hospital is Maternite Port Royal.