Constantine the Great was the first Roman ruler to convert to Christianity.
He built St Peter's church in Vatican City and founded Constantinople (now Istanbul) as capital of the eastern Roman empire.
In 325 he presided over the first ecumenical council at Nicaea (now Iznik) in Turkey, at which the words of the Nicene Creed, which are still repeated with little change, were agreed.
This man, who ended the persecution of Christians, who unified the divided groups within Christianity, who restored the civil powers of government and the senate, and who reunited East and West in Europe's greatest empire, deserves better recognition. He was perhaps the most influential individual in the development of European civilisation.
Is Britain's own great Roman emperor not worthy of celebration?
James Darley Gledehill, Green End Road Radnage, High Wycombe, Bucks