Covered up and boxed in a storage vault in the town of Enniskillen, two historic oil paintings gathered dust. King William III commissioned the portraits of himself and Queen Mary after he routed Catholic forces in the Battle of the Boyne in 1690, a turning point in Irish history that established Protestant ascendance. Unionists revere King Billy, also known as William of Orange, as a hero who saved their settler ancestors. The portraits used to.