Historian and architect, born in the Frankish Empire near the River Main c.770; died Seligenstadt, 840.
He was educated at Fulda and in the Palace School of Charlemagne, where he had Alcuin among his masters.
His talent in mathematics and architecture was so great that he was charged with the construction of such buildings as the Cathedral of Aachen.
He was one of the emperor's most trusted advisers and acted in this capacity to Louis the Pious and his son Lothaire.
He had been granted an estate at Muhlheim, where he founded an abbey which he called Seligenstadt, to which he withdrew after the death of his wife Emma.
His is the best biography of the Middle Ages.
New Catholic Dictionary