The piano on which John Lennon composed his classic hit Imagine is to tour global sites of past violence to promote peace.
John Lennon bought the Steinway Model Z upright piano in 1970
The upright piano, now owned by George Michael, will this week be photographed at the US site of Martin Luther King's assassination in 1968.
There are plans for a tour documentary and photo album in aid of charity.
Imagine was a UK number one following Lennon's assassination in 1980. Michael bought the piano for £1.67m in 2000.
The piano will be photographed in Memphis, Tennessee, on Wednesday, the 39th anniversary of the shooting of the civil rights leader.
The site is now home to the US's National Civil Rights Museum.
"The selection of this site evokes a deep sense of emotion for everyone," George Michael said.
"Capturing the image of this special piano on which a song of peace was composed is part of the heartbeat of this project."
The title song of Lennon's 1971 album Imagine has become the most famous song of his post-Beatles career and an enduring peace anthem.
Video from the recording sessions shows Lennon using the piano to play Imagine to his musicians, the Plastic Ono Band, for the first time.
The Steinway Model Z upright piano, made in Hamburg, was bought by Lennon in London in December 1970.
A white grand piano famously is featured on the album cover and in the video for Imagine.