Exit the Pauline Hall, turn left and keep going along the Loggia Paolina until you will find a stairway leading you in the Courtyard of the Angel; follow the exit signs and you will be back in the diametral ramp; go downstairs and you will be on a metal bridge, which will lead you to the bastions. You will walk along the rampart of the castle heading to the right, toward the direction of the bastion of San Luca. The circuit runs along the Armory of Clement X.