San Pedro de Alcantara was a 64-gun Spanish man-of-war, which sank near Peniche, Portugal, loaded with so much treasure that her shipwreck shocked the financial markets of Spain.

San Pedro de Alcantara was built of mahogany in Cuba in 1770, by an English shipbuilder in Spanish service.

[2] During her voyage from Peru, San Pedro de Alcantara was constantly leaking, and the crew had a hard time manning the pumps.

San Pedro de Alcantara sank in a storm on February 2, 1786, at approximately 10.30 PM, off Peniche, on the Portuguese coast, with the loss of 128 people.

[1] Salvage operations began almost immediately, carried out by around 40 underwater divers, who without the help of any breathing apparatus brought up almost 750 tons of cargo over the three years following the disaster.