Flor de la Mar
From Tardis Wiki, the free Doctor Who reference
The Flor de la Mar was a ship which sunk off the coast of Sumatra in the 15th century. (TV: Legend of the Sea Devils)
On New Year's Day 2022, the Thirteenth Doctor told Yasmin Khan and Dan Lewis that she always wondered what happened to it and its lost treasure, and suggested they should go find out. (TV: Eve of the Daleks)