The Treaty of Limerick, which actually consists of two treaties, is signed on October 3, 1691 ending the Williamite War in Ireland between the Jacobites and the supporters of William III of England, widely known as William of Orange. Reputedly they are signed on the Treaty Stone, an irregular block of limestone which once served as a mounting block for horses. This stone is now displayed on a pedestal in Limerick, put there to prevent souvenir hunters from taking pieces of it. Because of the treaty, Limerick is sometimes known as the Treaty City.

After his victory at the Battle of the Boyne in July 1690, William III issues the Declaration of Finglas which offers a pardon to Jacobite soldiers but excludes their senior officers from its provisions. This encourages the Jacobite leaders to continue fighting and they win a major victory during the 1691 Siege of Limerick. However, defeats the following year at the Battle of Aughrim and the second siege of Limerick leave the Williamites victorious. Nonetheless the terms they offer to Jacobite leaders at Limerick are considerably more generous than those a year earlier at Finglas.

One treaty, the Military Articles, deals with the treatment of the disbanded Jacobite army. This treaty contains twenty-nine articles. Under the treaty, Jacobite soldiers in formed regiments have the option to leave with their arms and flags for France to continue serving under James II of England in the Irish Brigade. Some 14,000 Jacobites choose this option. Individual soldiers wanting to join the French, Spanish or Austrian armies also emigrate in what becomes known as the Flight of the Wild Geese. The Jacobite soldiers also have the option of joining the Williamite army. One thousand soldiers chose this option. The Jacobite soldiers thirdly have the option of returning home which some 2,000 soldiers choose.

The second treaty, the Civil Articles, which contains thirteen articles, protects the rights of the defeated Jacobite landed gentry who choose to remain in Ireland, most of whom are Catholics. Their property is not to be confiscated so long as they swear allegiance to William III and Mary II, and Catholic noblemen are to be allowed to bear arms. William requires peace in Ireland and is allied to the Papacy in 1691 within the League of Augsburg.

It is often thought that the Treaty of Limerick is the only treaty between Jacobites and Williamites. A similar treaty had been signed on the surrender of Galway on July 22, 1691, but without the strict loyalty oath required under the Treaty of Limerick. The Galway garrison had been organised by the mostly-Catholic landed gentry of counties Galway and Mayo, who benefited from their property guarantees in the following century.

(Pictured: The Treaty Stone on which the Treaty of Limerick may have been signed)