The Island of Ireland Peace Park and its surrounding park, also called the Irish Peace Park or Irish Peace Tower in Messines, near Ypres in Flanders, Belgium, is a war memorial to the soldiers of the island of Ireland who died, were wounded or are missing from World War I, during Ireland's involvement in the conflict. The tower memorial is close to the site of the June 1917 battle of Messines Ridge, during which the 16th (Irish) Division fought alongside the 36th (Ulster) Division.

The 16th (Irish) Division was an infantry division of the British Army, raised for service during World War I. The division was a voluntary 'Service' formation of Lord Kitchener's New Armies, created in Ireland from the 'National Volunteers', initially in September 1914, after the outbreak of the Great War. In December 1915, the division moved to France, joining the British Expeditionary Force (BEF), under the command of Irish Major General William Hickie, and spent the duration of the war in action on the Western Front. Following enormous losses at the Somme, Passchendaele and Ypres, the 16th (Irish) Division required a substantial refit in England between June and August 1918, which involved the introduction of many non-Irish battalions.