What is the name of the largest ship built in the history of shipbuilding?

TT Knock Nevis was a ULCC supertanker that was the longest ship ever built. She possessed the greatest deadweight tonnage ever recorded. Fully loaded, she was incapable of navigating the English Channel, the Suez Canal or the Panama Canal. Overall, she is generally considered the largest ship ever built. She was sunk during the Iran–Iraq War, but was later salvaged and restored to service.