His paternal grandfather was a Lucius Septimius (born c. 210), son of Gaius Septimius Severus Aper, while his maternal grandparents were the Roman Senator Pomponius Bassus and wife the noblewoman Pomponia Gratidia.
Bassus was praefectus urbi of Rome between 317 (he is attested in office on 15 May) until 319 (at least until 1 September).
Between 13 July and 13 August 318, he was at court; for this reason he was substituted by Julius Cassius.
He had a daughter, Septimia Bassa, born c. 305, who was the first wife of Valerius Maximus Basilius.
This ancient Roman biographical article is a stub.