Overview
Constantine (, 820s or 830s – before 836) was an infant prince of the Amorian dynasty who briefly ruled as co-emperor of the Byzantine Empire sometime in the 830s, alongside his father Theophilos. Most information about Constantine's short life and titular reign is unclear, although it is known that he was born sometime in the 820s or 830s and was installed as co-emperor soon after his birth. He died sometime before 836, possibly after falling into a palace cistern.
Life
Constantine was born to the Byzantine Emperor Theophilos and his wife Empress Theodora. The coinage issued under Theophilos suggests that Constantine was their firstborn son, and he was perhaps their eldest child, although there remains a possibility that he was any one of their first four. He had five sisters: Thekla, Anna, Anastasia, Pulcheria, and Maria. Constantine and his family belonged to the Amorian dynasty, which had ruled the Byzantine Empire since the accession of Constantine's paternal grandfather Michael II to the imperial throne in 820. Unusually, Theophilos defied standard naming conventions, as his son was not named after Michael II; instead, Theophilos chose the name Constantine, which the Byzantinist Judith Herrin explains could be an homage to Constantine the Great or a hope that the prince would continue the iconoclastic religious policies of previous emperors named Constantine.
As Theophilos had succeeded Michael II on 2 October 829, Constantine was heir to his father's throne and was crowned co-emperor a short time after his birth. He appears as such on the coinage issued under his father, albeit addressed as (not a formal title, but an honorific interchangeable with , i.e. emperor) on gold coins, but with no title at all on bronze ones. He died shortly afterwards, still in his infancy. The British historian Philip Grierson used the inscription on Constantine's coffin, which read , meaning "little coffin", as evidence to support the claim that Constantine died young.
There is little clarity as to the dates of his birth, coronation and death. In the, its authors, including the Byzantinist Ralph-Johannes Lilie, state that Constantine's birth date could possibly be during the 820s and his death date to be before 831. The historian Lynda Garland argues that Constantine was born in 834 and died when he was two years old, assuming that he was crowned immediately after his birth. Herrin also agrees with this birth date.
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