The forward conning tower had a 200 mm (7.9 in) thick roof and 350 mm (14 in) thick sides, while the range finder had an armored roof 100 mm (3.9 in) thick and 200 mm (7.9 in) thick sides. The aft conning tower had much lighter armor: the roof was 50 mm (2.0 in) thick and the sides were 150 mm (5.9 in), while the aft range finder had a 50 mm (2.0 in) thick roof and 100 mm (3.9 in) sides.[4] The main battery turrets were reasonably well-protected: the turret roofs were 130 mm (5.1 in) thick, the sides were 220 mm (8.7 in) thick, and the faces were 360 mm (14 in) thick with 220 mm (8.7 in) thick shields.[4] These armor thicknesses were less than those of contemporary British (King George V) and French (Richelieu) designs. Conversely, the secondary battery was better-protected than most rivals.[35] The 15 cm (5.9 in) gun turrets had 35 mm (1.4 in) thick roofs, 40 mm (1.6 in) sides, and 100 mm (3.9 in) fronts.