The Yorck is a paper ship that was never built. She was designed in the interwar period for the Reichsmarine (which later became the Kriegsmarine) as one of the possible heavy cruiser designs that would later become the Deutschland Class Cruisers. She wasn’t selected because she did not meet the requirements of having 11″ guns but instead used the same guns and mounts as found on the armored cruiser SMS Bluecher which was a 210mm gun.
In game, she isn’t the best T7 cruiser and is kind of inflexible in her play style due to slow turret traverse and poor long range gunnery skills. The lofty shell arcs and slow shell speeds will make USN cruiser captains feel at home but will make those used to higher velocity 8″ gunfire feel uncomfortable. She is extremely maneuverable and small in profile which helps her out a lot however she loses speed really quickly in a turn. Overall, I’d put her above the Pensacola for 90% of the playerbase but behind the other T7 cruisers.