The wall will travel around the country as part of the Memories Matter campaign
A Cambridgeshire research charity has called on famous names to recall their most vivid memories.
The Alzheimer's Research Trust has gathered stories from the likes of Gordon Brown, Sir Michael Parkinson and Sir Terry Pratchett.
These will be added to a wall of memories collected from members of the public and displayed in the Grand Arcade in Cambridge.
Memory-related illness affects 700,000 people in the UK.
The Great Shelford-based charity, which tries to find treatments for Alzheimer's and other forms of dementia, will be on hand to offer information about the disease.
Shoppers and passers by will get the chance to put their own memories, good or bad, up on the wall.
Pauline Mclynn has written a book about Alzheimer's
Smell of coal
The Prime Minister, Gordon Brown, remembered watching Scotland play Brazil in the 1982 World Cup while TV presenter Fern Britton selected the birth of her baby twins as a fond recollection.
Author, Sir Terry Pratchett, who is an Alzheimer's sufferer, wrote: "The day my daughter was born. The elation - nothing could've gone wrong that night.
"I'd hate to lose that memory."
Meanwhile TV favourite Sir Michael Parkinson recalled the smell of the coal mines as his earliest memory.
He said: "It was across the fields where my father worked.
"I thought I'd end up there but I didn't, thank God."
The memory wall will be on display on Saturday 6 February.
After its launch it will travel around the country as part of the Memories Matter campaign.