The King Tiger, also known as the Tiger II, was a German heavy tank developed during World War II. It was the successor to the Tiger I, and was one of the largest and most powerful tanks of the war. The King Tiger was armed with a long-barreled 8
From Wikipedia
The Tiger II was a German heavy tank of the Second World War. The final official German designation was Panzerkampfwagen Tiger Ausf. B, often shortened to Tiger B. The ordnance inventory designation was Sd.Kfz. 182. It was also known informally as the Königstiger ) Allied soldiers often called it the King Tiger or Royal Tiger.