In dictionaries:
Constantine I of Greece
Constantine I (romanized: Konstantínos I; – 11 January 1923) was King of Greece from 18 March 1913 to 11 June 1917 and from 19 December 1920 to 27 September 1922.
Helena, mother of Constantine I
Flavia Julia Helena (Helénē; AD 246/248–330), also known as Helena of Constantinople and in Christianity as Saint Helena, was an Augusta of the Roman Empire and mother of Emperor Constantine the Great.
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