# The praetorian prefect Tigidius Perennis is removed and killed about 185 as received Date: 185 ## The fact About 185 Tigidius Perennis, praetorian prefect, was executed or delivered to death as Dio and Herodian print. This Fact is that prefect-fall instrument, not Cleander’s later fall and not a unique payroll of the Guard. It is one event. ## Context A prefect who monopolises office and then dies by court-army pressure is a corruption-and-violence path. Responsibility is shared with soldiers and rivals. [Commodus](/people/commodus)’s documented role is bounded by other offices and collaborators named in the sources below. Sharing a field with them is not a reason to drop a documented act, and it is not a reason to assign later consequences done in the name after death. Perennis concentrated prefect power; army complaint and imperial fear are the received mechanism. Sources disagree on exact agency. Commodus is the named emperor under whom a prefect dies. HA is unreliable on details. Named person as heading of the dated public instrument. Later editors, museums, printers, or offices share publication. Complex where later carriers are the surviving public file. ## Evidence and sources Loeb Dio and Herodian independently narrate Perennis’s end in the mid-180s. Official or archival record: Cassius Dio Book 73 (Loeb English) — Commodus (https://penelope.uchicago.edu/Thayer/E/Roman/Texts/Cassius_Dio/73*.html; LacusCurtius / University of Chicago). ## Significance Prefect-killing as politics is an [institutional-corruption](/drivers/institutional-corruption) path. Confidence medium on motive, high on the fall as event. ## What is established and what is not Established: Perennis dead about 185 as received. Not established: a forensic reconstruction of every charge. What would change the picture: a contradictory original with a different date or name, or a measured series that can be argued, with lag and alternatives, as a consequence of this instrument rather than of later institutions. The date is the date of this instrument, not a licence to back-date every later harm or benefit. Established here: a sourced, dated public instrument with a named contribution by Commodus. They are not a public rating. The driver `institutional-corruption` is attached because the mechanism named in Significance follows from this instrument, not because a standing list of welfare headings needed another tick. Commodus did not file a later UNESCO form, a later Loeb colophon, or a later museum label as a personal act. A portrait or conventional bust is not this mechanism. Allegation, reconstruction, and established occurrence stay distinct. A prefect’s death is not a gladiator bout. Keep 185 distinct from 190. Keep the carrier date of later English distinct from the received historical year stored in the date field. Do not read a later English edition as a recovered autograph of Commodus. ## People - Commodus: https://factrail.ai/people/commodus ## Drivers - Institutional Corruption: https://factrail.ai/drivers/institutional-corruption ## Sources - https://www.livius.org/sources/content/herodian-s-roman-history/ - https://penelope.uchicago.edu/Thayer/E/Roman/Texts/Cassius_Dio/73*.html ## Methodology https://factrail.ai/methodology Canonical: https://factrail.ai/facts/com-perennis-185