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. There, in 1971, he composed and recorded the song "Imagine" on the piano, and was filmed using it to play the song to his wife Yoko Ono.

The Imagine Peace Tower is a memorial to John Lennon from his widow, Yoko Ono, located on Viðey Island in Kollafjörður Bay near Reykjavík, Iceland. Installed in 2007, it consists of a tall tower of light, projected from a white stone monument that has the words "Imagine Peace" carved into it in 24 languages. These words, and the name of the tower, are a reference to Lennon's campaign for peace, and his 1971 song "Imagine".