Bassianus (died 316 AD) was a Roman senator, whom the Emperor Constantine I arranged to marry his half-sister, Anastasia.
[1] According to the Anonymus Valesianus, a Latin chronicle composed during late antiquity, Bassianus was accused of plotting against the throne and was executed by Constantine.
[1] The choice of Bassianus is probably to be understood in light of the fact that Bassianus' brother, Senecio, was a high official in service of Licinius, Constantine's colleague in the East, and thus this marriage strengthened the bond between the two augusti.
The next year, in 316, Constantine sent his half-brother Julius Constantius, to Licinius at Sirmium, with the proposal of elevating Bassianus to the rank of caesar and with power over Italy.
Recent prosopographical studies suggest that Bassianus and Senecio were members of the families of Anicii and of Nummii Albini Seneciones.