Constantius Chlorus, or the Pale, Roman emperor; after a struggle of three years reunited Britain with the empire, which had been torn from it by Allectus; was equally successful against the Alemanni, defeating them with great loss; died at York, on an expedition against the Picts; was succeeded by Constantine, his son (250‒305).
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Constantinople * Constituent Assembly