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In this documentary we explore the mysterious history of the Frumentarii, Rome's feared network of spies and assassins. We begin with a review of their origins as grain collectors and courriers. This role slowly matured over the course of the Roman Republic with Frumentarii becoming a regular fixture of logistics by the early Roman Empire. We cover how this group came to have a headquarters in Rome and what their unit's organization and equipment would have looked like. However their presence in Rome and travel to and from the provinces proved convenient for them to now take on additional roles. It seems that Roman Emperor's soon began to recruit them into their own network to take on a variety of roles such as spying and potentially even assassination.
Sources: "Intelligence activities in ancient Rome" by Rose Sheldon "Exploratio: Military & Political Intelligence in the Roman World" by N. J. E. Austin "The Troops Quartered in the Castra Peregrinorum." by Reynolds P.K.B. "The Castra Peregrinorum." by Reynolds P.K.B. "The Roman Secret Service" by W.G Sinnigen "The origins of the Frumentarii" by by W.G Sinnigen
Credits Research = Invicta Script = Invicta Narration = Guy Michaels Art = Penta Limited
Deep within the heart of Rome lay the headquarters of one of the empire's most feared units.
Shrouded in mystery, they seem to have begun as humble grain men and couriers. Yet as the tendrils
of their reach grew, so too did their ability to covertly enact the will of the emperors.
From enforcement and espionage to arrests and assassinations,
they are often equated to the CIA or the Secret Service of Antiquity.
Yet how much of this legendary reputation can we attribute to fact or fiction?
To answer this question, let's explore the history of the Frumentarii.
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The origin of the frumentarii is not well attested to. However, evidence points to them
potentially emerging from two pre-existing army duties, the collection of grain and the
collection of intelligence. We can tackle each in turn. With regards to the collection of grain,
the association is quite evident given that the term frumentum in Latin literally translates
to grain. Ancient military authors make frequent mention of such frumentum in their campaigns,
both in its collection and distribution to the men. Tacitus labels the soldiers tasked
with transporting this grain as frumentatores. Caesar's commentaries, meanwhile, explicitly
label them as frumentarii. This would appear to be a clear connection to the frumentarii
we are interested in. However, in such early years, the role seems to have been rather ad hoc
and not quite as professionalized as their later incarnation. Yet, in the decades following the
era of Caesar, it seems that the logistical apparatus behind the grain supply gradually
matured. We know, for instance, that in Ostia, Rome's coastal port, a dedication was made by
a centurio frumentarius to his superior officer, the prefect of the grain supply. Presumably,
such men were part of the important organization established to ensure the masses of Rome
received their all-important food supply. A similar logistical group was likely also
embedded within each legion's provincial fortress to ensure that it too was fed.
Evidence for this appears in the form of a handful of funerary inscriptions, where we
see soldiers self-identify as the frumentarius of their legion for the care of the grain supply.
Yet, the inner workings of these provisioning systems eludes us. What proves more confusing
is that around the 2nd century AD, we see frumentarii agents being associated
with another parallel collection system, that of intelligence.
This apparatus arose from the connective tissue which had grown between the various legions,
their local governor's offices, and the central imperial government in Rome.
In terms of the legions, these had already evolved a system of professionalized military
intelligence. For armies in the field, this ultimately took the form of a three-layered
system which included the following. A close range of patrolling procuratories.
A mid-range ring of scouting exploratories. And a far-reaching projection of spying
speculatories. The existence of such units bred a talented pool of intelligence operatives
with a robust set of standards and practices. While their reports and services would have
been used by the legionary commander, much would eventually have filtered to the local governor,
whose job it was to remain well-informed about his province and its surrounding area.
Such legionary reports, combined with additional sources, would then have been compiled,
synthesized, and shared up the chain of command to the powers in Rome.
This was done via an efficient courier network known as the cursus publicus,
which ran across virtually the entire breadth of the empire.
Thus, it seems natural that over the years, this intelligence pipeline would gradually develop its
own bureaucratic organization. As it did so, the frumentarii seemed to have become involved,
as can be seen in funerary depictions, where we see intelligence agents riding atop the messenger
carts of Rome's courier network. Ultimately, how these two origin stories, one of men collecting
grain and one of men collecting intelligence, may have emerged or evolved into one another
is unknown. Yet, the overlap between the two roles seems quite natural. After all,
the status of the all-important grain supply was, in and of itself, a valuable piece of intelligence.
It was also true that the people involved in its collection, the farmers, merchants,
and sailors, would have had a pulse on the goings-on of the world.
Thus, agents traveling back and forth across the empire to supervise grain logistics
or to collect and carry information could easily perform both tasks at once.
Evidence of this dual role appears in one of the earliest epigraphic records of the frumentarii.
In a letter from an Egyptian archive dated to the early 2nd century AD, a man writes that he
had sent a message, quote, which Sopronius Clemens, the frumentarius, will deliver.
But, however the frumentarii came to be, from the 2nd century on, we have quite clear evidence
that they were established as a distinct group of operatives with a base in Rome.
Now let us take a look at their organization, headquarters, equipment, and service history.
We can begin with their organization. According to various inscriptions, the frumentarii were
apparently a collection of soldiers who had been detached from their legions to serve on this
special assignment. The entire group, which numbered perhaps anywhere from a few dozen to
a hundred or so men, was organized into a unit known as the Numerus Frumentarium.
It was structured in the manner of a regular military force with junior officers, centurions,
and an overall commander known as the Princeps Peregrinorum, or chief of the foreigners.
From here, one could apparently use the position as a stepping stone to seek higher offices.
As we shall see, close service to the emperors had its perks, and there may even have been a
track leading from frumentarii to the vaunted ranks of the praetorians, as is hinted at by
Cassius Dio, who attributes the rise of three praetorian prefects to their prior service among
the frumentarii. Now let us explore the headquarters of this unit. Though the members
of the Numerus Frumentarium, by necessity, were often dispersed across the empire,
they nonetheless shared a central home back in Rome. Located atop the Caelian hill,
it was known as the Castra Peregrina, or foreigner's camp. The headquarters appears
to have been a facility in a similar manner as the more famous Castra Praetoria of the praetorians.
As such, it boasted its own barracks, support structures, and a small shrine.
Records facilities may have been present, but it does not seem that the Castra Peregrina
functioned as any sort of grand repository for the secrets of Rome. Rather, it would have been
the various archives and libraries which housed much of the written work stored in the capital.
There was also the Ab Epistolis, or office of the procurator, in charge of imperial correspondence,
which may have acted to process information. Yet for most of their history, these institutions
were run by civil rather than military figures, with no mention of a connection to the operation
of the frumentarii. Such a state of affairs dampens the idea that any sophisticated central
intelligence operation existed in Rome. To the extent that any such apparatus had arisen,
it would most likely have been found out in the provinces. After all, it was here that governors
were kept up to speed with the latest news of their local area, with the task of acting as
a first responder to any pressing matters, rather than waiting for directions from the distant
emperors. Though of course, advice and permission was often sought out. To this end, a governor's
headquarters boasted huge records facilities run by military staff officers of the officium.
Perhaps the frumentarii, given their military rank, may have been counted among their number.
Such an arrangement would have benefited the emperors who might get a second set of eyes
on the activities of their underlings. But we shall cover these efforts in due time.
For now, let's zoom in to get a better look at the members of the frumentarii up close.
In terms of appearance, there may be a temptation to imagine them on two ends of a spectrum,
either with ornate gear befitting their special role, or with extremely clandestine outfits in
the manner of some undercover agent. However, what records we do have seem to indicate that
the frumentarii were basically outfitted as regular soldiers. At times, this meant donning
their full kit, but otherwise having the liberty to dress down for convenience.
There are, however, some hints at identifying pieces of gear. For instance, men who used the
courier service on imperial duty were identified by carrying a special lance, known as the
beneficiarius. Perhaps this item made its way into the standard outfit of a frumentarii agent.
Beyond this speculation, we can more confidently expect the usual gradation
of distinguishing marks which accompanied the various ranks of the optios, the centurions,
and the senior commanders. So, what did these frumentarii do?
Unfortunately, we don't have a detailed record, but we can nonetheless sketch an outline based
on some clues. This involves the following roles as grain supervisors, couriers, spies,
assassins, and agents of law enforcement. Regarding the first two, these duties would
have been continuations of the earlier tasks which predated their origin.
The fact that such activities continued on when the frumentarii proper had been established
is attested to by both textual and epigraphic records.
For instance, in 210 AD, a centurion of the frumentarii is recorded as helping to coordinate
the dredging of a harbour used to offload grain. In 238 AD, during a period of imperial transition,
we are told that, quote, a letter sent to all the provinces by means of the frumentarii
ordered that whoever gave assistance to Maximinus would be numbered among the enemy.
While we previously mentioned that such grain and courier-related duties tied them to the
location of an army, a governor's office, or key ports, it seems that there were also special
assignments. One gravestone of an agent, for instance, lists his title not as the frumentarius
of any legion, but as, quote, a frumentarius of the emperor stationed at Leon. Thus we see
that they were increasingly being used as tools of the emperor. As such, there were certainly
more creative ways one might use them. According to the Historia Augusta, for instance, Hadrian
began to use them as domestic spies. The passage reads, quote, for he was inquisitive not only
about his own household, but also about his friends, to the point of investigating their
secrets through his frumentarii. By intercepting letters from a senator's wife, Hadrian was
apparently able to learn of complaints about the man's indulgent habits in Rome. The ensuing
reprimand caught the senator off guard, leaving him to wonder how he had been exposed. Similar
stories of domestic spying are reported with regards to the emperors Macrinus and Gallienus.
Frumentarii apparently also listened in at the games and theatres to hear what the public had
to say. That this sort of operation took place is not surprising. After all, in days past,
the senators of the republic had employed their own systems to spy on the businesses
and households of their rivals. Naturally, the most powerful man in Rome did the same.
But this need not only had been used to sniff out potential threats. Such information was
generally useful for the proper management of the empire's human resources. Who might best be
promoted, transferred, or demoted were all as important decisions to make as who might best be
killed. Yet, this last option was not ruled out. Indeed, we have several links to the Frumentarii
being used as assassins. During the reign of Commodus, for instance, Praetorian prefects
had apparently wished to eliminate an individual and, quote, murdered him as he was returning to
his estate by means of the Frumentarii. Other mentions of assassinations are a bit less
explicit. In 195 AD, for example, we hear vaguely that some agents had been dispatched to Britain
to assassinate the pretender Clodius Albinus. Their identity as Frumentarii is thus assumed
rather than confirmed. Another intriguing story comes during the reign of Emperor Severus,
when a certain centurion named Achilles, notorious as the assassin of senators,
was sent by his enemies to kill the monarch. Contemporary writings, meanwhile, identify a man
by the name of Marcus Achilles Felix, who was a centurion of the Frumentarii.
Though it may be a coincidence, linking the two seems plausible. Ultimately, however, it is
difficult to determine whether these sorts of assassinations were a standard service of the
Frumentarii or rather a reflection of the desires of the powers in charge who wished to wield them
as such. One might imagine that the out-in-the-open nature of the Frumentarii may have undermined
their ability to act as spies or assassins. However, the very fact that they appeared to act
as logistics officers and couriers may have deferred some suspicion. One might also imagine
that on missions of subterfuge they were given enough resources and leeway to recruit others
to help them. To this end, the use of deletores or informants may have been standard procedure.
But such work in the shadows is unlikely to have been recorded and thus remains pure speculation.
Finally, we must mention yet one more role which we see associated with the Frumentarii,
that of law enforcer. This comes to us from scattered sources. An edict from the 3rd century
AD, for example, records how the Frumentarii, quote, arrested nine, put them in chains, and
sent them to the equestrian procurator. Such arrests are most commonly attested to in the era
of Christian persecutions. The author Eusebius tells of one case where a Frumentarius was sent
to hunt down a man by the name of Dionysius. The Christian reportedly hid away in his home for
four days while the agent prowled the streets, rivers, and fields looking for him. In other
writings, Saint Cyprian reports that he had to flee from Frumentarii sent to arrest him,
while the disciple Paul was supervised by a Frumentarius while awaiting trial in Rome.
Yet they were not uniquely seen as feared enforcers. Arrests and assistance in peacekeeping
operations also could be appreciated. For example, inscriptions mention how Frumentarii
were actually called upon in several instances to intervene on behalf of rural communities
facing harassment from soldiers and other troublemakers.
Beyond this, we have even more mentions of the odd jobs taken up by Frumentarii across the empire.
One ran a prison in Anatolia, one supervised building activity in Delphi, and one raised
emergency city walls in Salona. Thus we see how the Frumentarii were a quite flexible organization
whose agents could be dispatched by the emperor or his governors to take on a range of roles
on a quite ad hoc basis. Ultimately, however, it seems that this sort of runaway scope creep
proved their undoing. By the end of the third century, they had begun to run rampant with
a notorious reputation for trouble. The ancient author Aurelius Victor claims that,
quote, they had apparently been set up to investigate and report on any potential
rebellions in the provinces. And by their wicked concoction of accusations and by spreading fear
everywhere, particularly in the most remote areas, they caused the most awful disruption
to everything. The end result was that their organization would be disbanded by Diocletian.
Yet the need for such a security and information service did not disappear. Thus it was that they
would eventually be replaced by the more rigidly controlled and bureaucratized institutions of the
late empire, such as that of the Agentes in Rebus. However, their story shall have to wait for another
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