Imagine Piano Peace Project
The Imagine Piano Peace Project was a peaceful demonstration against violence in which a piano associated with nonviolence was exhibited at various U.S. sites of infamous violence. The piano, a Steinway upright, was purchased new by John Lennon in December 1970 and delivered to the recording studio in his home in Berkshire, England.
Source: Wikipedia — Imagine Piano Peace Project (CC BY-SA 4.0)