The Nuestra Señora de Atocha was a Spanish treasure galleon, constructed in Havana, Cuba in 1620, which was part of the Tierra Firme fleet of 28 ships, and was one of the eight ships that sank in a hurricane off the Florida keys in 1622. As a heavily armed ship, it would have served as a rear guard for the fleet. At the time of it's sinking, the ship was full of copper, silver, gold, and other goods from South American and Caribbean ports bound for Spain. A substantial portion of the sunken ship and its cargo was located in 1975 by Treasure Salvors, Inc. and subsequently salvaged, though the sterncastle of the ship, which would have held the majority of the gold and emeralds, is yet to be located.