 Leipzig had her anti @-@ aircraft armament modernized to bring her closer to the standard of weaponry fitted to her sister . After 1934 , two additional 8 @.@ 8 cm guns were added , with another pair later . Starting in 1941 , eight 3 @.@ 7 cm guns were installed , along with fourteen 2 cm guns . After 1944 , she only carried eight of the 2 cm guns . Nürnberg 's anti @-@ aircraft battery was improved over the course of World War II . In late 1942 , a pair of Army @-@ variant 2 cm Flakvierling quadruple mounts were installed , one on the navigating bridge and the other on top of the aft superfiring turret . In May 1944 , the navy proposed installing several Bofors 40 mm guns , but most of these weapons were diverted to other uses , and only two guns were installed . One was mounted on the bridge and the other where the catapult had been located . Two Navy @-@ pattern Flakvierlings were added ; one replaced the Army model atop the aft superfiring turret , and the other was placed in front of the anti @-@ aircraft fire director . The Army @-@ pattern Flakvierlings were moved to the main deck . In December 1944 , another revised anti @-@ aircraft plan was proposed , this time incorporating the new 3 @.@ 7 cm FlaK 43 gun , of which there were to be eight , along with two Flakvierlings and ten 2 cm twin mounts . Germany 's wartime situation by the end of 1944 prevented these changes from being made , however . 
