Largest one yet may have been located: chained link Although we are cautioned to doubt that anyone would put 200 tons of gold on a single ship. I mean seriously - who trusts a Captain that much? To put this in context of other finds: 10 Greatest Shipwreck Treasures Ever Found | TheRichest Apologies for that rather clickbaity site. I imagine there is a wikipedia page on or near the subject.
i really enjoyed the treasure hunting show on discovery. imperial navy cruiser sounds like star wars.
When Spanish were moving a lot of Latin America's silver they would put about 50 tons on each. More than I might have guessed as those wooden ships seemed to magically attract both shipworms and hurricanes.