http://www.adp.fsu.edu/1733.html
On Friday the 13th, in July of
1733, the
Nueva Espana fleet of treasure ships left Havana on its return voyage to Spain. The departure date of Friday the 13th proved to be quite unlucky for this fleet of four armed galleons, eighteen merchant naos , and various smaller ships carrying the treasures of the New World back to the seat of the Spanish Empire. A hurricane struck the next day after the ships had sighted the Florida Keys. Only one ship escaped safely back to Havana, and the others were sc attered and wrecked along the Upper Florida Keys.
The Spanish authorities salvaged what treasure they could over the next few years. Then these shipwrecks were forgotten until the 20th century. Modern day treasure hunters relocated and looted most of the remaining wrecks of the 1733 fleet. Unfortunate ly, most of these salvers cared more about monetary rewards than they did about history, and most simply dug into the shipwreck remains with little concern for modern archaeological techniques. No field notes were kept, and nothing was recorded with the meticulous care usually given to important archaeological sites. As a result, much knowledge that might have been gained has been lost forever, and many beautiful museum-quality artifacts are now in private collections, forever hidden from the public.