An area of the building has been set aside to display the work for the next four years to mark the centenary of the conflict.
It shows intricate floral and bird designs with the chalice of the Eucharist and the palm branches of martyrdom and was designed by men recovering in hospitals all around the country.
Embroidery was a classic device for the rehabilitation of soldiers during WWI, because this intricate work helped to reduce the effects of shell shock.
A special service will be held on Sunday 3 August at 6pm at which the altar frontal will be used for the first time since the 1940s.
Relatives of some of the men will be present, including two surviving children from the UK, and numerous members of one family from Canada.