St Constantine of Strathclyde and Govan is a saint of the Orthodox Church. Whilst there are no historical records of his existence, legend has it that he abdicated the throne of Strathclyde in 612 to become a monk, and later a priest. It is also said that he was Christianised by St Columba. Notwithstanding the lack of factual information, the date 612 AD would be in a time range that would be correct for the sarcophagus than any of the three known Scottish kings by the name Constantin(e), who all reigned later.
Reproduced with kind permission of the iconographer, Aidan Hart.