COUNTY SLIGO, IRELAND—A cannonball thought to have come from the ill-fated Spanish Armada has washed up on a beach in Ireland’s County Sligo. “We’ve had a number of items discovered recently because of the winter storms with them washing up then on the spring tides,” Dónal Gilroy, who found the cannonball while walking on the beach, told The Journal. Gilroy is chair of the Grange Armada Development Association. “It would have come from a smaller swivel cannon,” he added. Three of the ships of the fleet that attempted to invade England were driven into Donegal Bay by bad weather on September 21, 1588, where they wrecked four days later after putting down anchor. More than 1,000 people are thought to have died when the ships, La Lavia, La Juliana, and Santa Maria de Vision were lost. To read more about underwater discoveries, see "History's 10 Greatest Shipwrecks."