The Countess of Antrim laid the foundation stone of Knockagh Monument on October 7, 1922. And Mid and East Antrim Borough Council lit up the imposing landmark on Friday to mark this significant milestone.
A wreath laying ceremony also took place attended by representatives of the County Antrim councils who have taken care of the monument.
Meanwhile, Dr Paul Harron, chief executive of the Ulster Architectural Heritage Society, was guest speaker at a talk held in Carrickfergus Museum and Civic Centre on the architect who designed the monument, Henry Seaver.
Among those helping to mark the centenary was the Earl of Antrim, who officially launched a travelling exhibition about the memorial. Running until October 13 at the Antrim Street museum, it includes photographs of modern commemorations of the Battle of the Somme as well as wartime artefacts.
. Silent tribute
Veterans were among those remembering the fallen Photo: contributed
. Milestone marked
Marking the centenary of the imposing landmark. Photo: Contributed
. Poignant moment
A poignant moment from Friday's service at Knockagh Photo: Contributed
5. Special guest
The Earl of Antrim is welcomed to Carrickfergus Museum by the Mayor of Mid and East Antrim, Alderman Noel Williams. Photo: Picasa
6. Exhibition launch
The Earl of Antrim with local historian Dr David Hume and Lorraine Hunter, head of Members Services, Mid and East Antrim Council. Photo: Contributed
7. Council support
The Deputy Mayor of Antrim and Newtownabbey, Cllr Leah Smyth, with the Mayor of Mid and East Antrim, Ald Noel Williams. Photo: Contributed
8. Attending talk
Guests at the exhibition launch and talk in Carrick Museum and Civic Centre. Photo: Contributed