The main battery turrets were protected by of armor plate on the faces, on the sides, on the roofs, and on the rears of the forward turret and on the superfiring one. The barbettes that supported the turrets had thick armor above the main deck and reduced to below. The secondary battery turrets had 130 mm faces, sides and roofs, and rears; their barbettes were 100 mm thick. The conning tower had thick sides, a rear, and 170 mm on the roof. The tower mast was covered with light plating that was thick to protect it from strafing attacks, while the fire control directors received of plating.