Go back to the curved hallway and turn right to find a wall. Turn left to access the “Sala de Ornamentos”, where part of the Cathedral Treasury is preserved. Walk through this room to reach a chapel and turn right in order to return to the side naves of the cathedral. Continue straight ahead until you reach the central nave. On your right, you will see a circular dome, the ceiling of the Royal Chapel. Please keep in mind that you cannot access the Royal Chapel since it is a permanent place of worship. You can see it from the gate (official no. 33).