The mother of Julian Lennon unveiled what monument in Liverpool, England? 
John Lennon Peace Monument: The John Lennon Peace Monument, also known as the European Peace Monument, is a peace monument entitled Peace & Harmony in Liverpool, England, dedicated to the memory of John Lennon. Cynthia Lennon: Cynthia Lennon (née Powell; 10 September 1939 – 1 April 2015) was the first wife of English musician John Lennon and mother of Julian Lennon.
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