Jump down and push the golden ball onto the circular pressure plate. Grapple onto the hooks on either side of the golden ball to pull out the pin and then roll it down to the floor below. Head back to the light puzzle, step on the pressure plate to reset the lights and shoot the four buttons shown above. This one is lit up in both feet, lower back and right hand. When the door opens run through and make your way along to the second ledge. Come back to the light puzzle and shoot the left eye and sword. The door around the corner has gems in the left eye and the sword. Stepping on the pressure plate resets the puzzle. Run around to the left to find the first code. You’ll need to shoot the lights to open up various doors. The picture on the back wall is lit up with lights. Jump to the next ledge and use the grapple to run along the wall to the room at the end. From here you can jump over to the balcony on the left side. Jump across to grab the crack in the pillar on the left. Use the cracks in the pillar to climb up to the top.
To climb up run to the far back pillar on the right side. Once they’ve been killed you’ll get another short cutscene with Pierre. Run forwards and kill the two Lions as they emerge from behind the broken pillars.