Make your way back across the Closet, Bathroom, Sitting Room and Dressing Room. Then continue across the Bedroom and through the Manueline Room to get you back to the Entrance Hall or Hall of the Archeiros. Once there, as you stand with your back to the Manueline Room, continue straight across the Hall towards the door you see at the end opening up to a patio. Take that door and stand in the middle of the Central Patio to learn more about it.