Lucius Catilius Severus Julianus Claudius Reginus was a Roman senator and general active during the reigns of Trajan and Hadrian.
He advanced to the traditional Roman magistracy of plebeian tribune; the fact he was praetor is omitted from this inscription, but must be presumed because it was required for the following offices Catilius is recorded as holding.
Normally a senator destined for the consulate would hold only two offices, command of a legion and governorship of a province or prefect of one of the aerarii or treasuries: Catilius held six of these.
First in the list was prefectus frumenti dandi (or Prefect responsible for the distribution of Rome's free grain dole), next was legatus or assistant to the proconsular governor of Asia, then curator of an unnamed road, legatus legionis or commander of Legio XXII Primigenia, and lastly prefect of each of the treasuries, aerarium militare in the years 105 to 107, then the aerarium Saturni in 108 to 110.
[10] Marcus Aurelius later recalled Catilius Severus' influence in his life as preventing him from attending "public places of teaching but to have enjoyed good teachers at home, and to have learned that it is a duty to spend liberally on such things.