In an "incredible" community response, many photographs were still arriving from throughout Otago, museum director Linda Wigley said.
"There's a lot of strong feeling about this subject. We've uncovered some amazing family stories," she said.
Part of an exhibition titled "We Will Remember Them", the Wall of Memories will accompany a roll of honour first displayed at the museum, in banner form, on Anzac Day last year.
The roll commemorates the more than 2500 Dunedin men and women who died in seven wars or other military conflicts last century.
The stark details in each entry on the roll attest to the cost of war to Dunedin and its families.
People have been invited to add a further "human touch" by providing images of loved ones who served in various wars, including those who had survived the conflicts but since died.
And a few people in the supplied photographs are still alive.
As usual on Anzac Day, this Saturday the museum will open early, about 7am, immediately after the dawn parade at Queens Gardens, and will remain open until 5pm.
The photographs will be displayed informally throughout the month-long commemoration.
Exhibition curator Sean Brosnahan said a recent Otago Daily Times story on the project had helped spark the strong response.
Dunedin resident Yvonne Thompson, who brought a family photograph to the museum yesterday, said the project was "a wonderful idea".
"A face can bring back more memories."
She is married to Norman Thompson, whose father, Hedley Thompson, and three Dunedin uncles, fought in World War 1.
One uncle, Corporal Herbert Thompson, was killed during the battle of Passchendaele, in Belgium, on October 12, 1917.
