In 1970 a concrete replica of the St John's Cross arrived in Iona sitting incongruously on the deck of a puffer delivering the island's annual supply of coal. What is the story behind this intriguing replica? How does it relate to the world's first ringed 'Celtic cross', an artistic and technical masterpiece, which has been at the heart of the Iona experience since the eighth century? What does it tell us about the authenticity and value of replicas?
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