The cursus publicus was the Roman Empire's state-run courier and transport system, created by Augustus to carry messages, officials and tax revenue between the provinces and Italy. It relied on a network of stations along the main roads, and it was closed to ordinary travellers.
Key takeaways
- The cursus publicus was the Roman Empire's state courier and transport service, created by the emperor Augustus [1].
- It was not a postal service for the public: use needed official permission, in the form of a pass called a diploma [1].
- The system used thousands of stations on the main roads, from change stations (mutationes) to overnight stops (mansiones) [1].
- Our map shows roads such as the Via Egnatia at 1,165 km, but not the stations that served them.
How the cursus publicus worked
Cursus publicus is Latin for "the public way". It was the state-run courier and transport service of the Roman Empire [1]. The emperor Augustus created it to move messages, officials and tax revenue between the provinces and Italy [1].
It was a system of obligations rather than a department with its own staff. Private contractors, called mancipes, provided the equipment, animals and wagons [1]. The service itself employed only the people needed to run it, such as vets, wagon-makers and grooms, and the couriers and drivers did not belong to it [1]. In the early empire the contractors were paid, but late in the empire the cost was charged to the people living along the routes as part of their taxes [1].
The core of the network was the line of stations along the main roads. These included change stations with repair facilities, the mutationes, and full-service stations with lodging, the mansiones [1]. One summary of the system describes thousands of stations that supplied fresh horses, mules, donkeys and oxen, as well as carts, food, fodder and accommodation [1].
Use was controlled. The cursus publicus was accessible only to the government or the military, and private citizens needed permission [1]. A pass, a diploma issued by the emperor, named the holder, the dates it was valid for, the means of travel, the route and the lodgings [1]. Abuse was a problem. Governors used passes to give themselves and their families free transport, and forged or stolen passes also turned up [1]. Under Hadrian the system gained a prefect to run it [1].
It was not a postal service in the way the Royal Mail is, and it was not a chain of state-owned hotels. It simply provided the infrastructure for magistrates and messengers travelling the empire [1]. The sender had to supply the courier, and the local area supplied the stations [1].
It did not operate everywhere. It worked in Italy and the more advanced provinces, and in Egypt and Asia Minor there was only one each [1].
An example from our data
The cursus publicus depended on roads, and our map shows the roads. The Via Egnatia, the longest named road in the data at 1,165 km, ran through Greece, Turkey, Albania and North Macedonia in the eastern half of the empire. The Via Appia, in Italy, is 576 km.
The network itself is large. The Itiner-e data has 299,171 km of road in 14,769 segments across 39 countries. Only 2.7% of that length is classed as certain, so the lines are mostly a careful reconstruction.
What the dataset does not hold is any station. There are no mansiones, mutationes, milestones or bridges in it. So the map shows the road network the service travelled on, but you cannot read the service's own geography from it. The Tabula Peutingeriana, a late map of the road network, is the better place to see how the stations were drawn, and the Wikipedia article notes that it shows the extent of the cursus publicus [1]. See also the how to read the map section and the data and accuracy section.
The thing people get wrong
The most common mistake is to picture the cursus publicus as a Roman Royal Mail that anyone could use to send a letter. It was a government service. Ordinary people sent letters with their own slaves or with friends who were travelling [1]. Another mistake is to think it was free for the state. The costs were always high, and in time the burden was pushed onto local communities [1].
Cursus publicus vs mansio
| Cursus publicus | Mansio | |
|---|---|---|
| What it is | The whole state courier and transport system | One kind of station within it |
| Who runs it | The state, using contractors and local communities | Run by an officer called the mansionarius [2] |
| Job | Carrying messages, officials and tax revenue | Overnight lodging for people on official business |
Frequently asked questions
Who started the cursus publicus?
The emperor Augustus created it to carry messages, officials and tax revenue between the provinces and Italy.
Could ordinary Romans use the cursus publicus?
Not freely. It was open to the government and the military, and others needed official permission.
Is the cursus publicus on the map?
No. The map shows the roads of about AD 150, not the stations along them.
Sources
- Cursus publicus, Wikipedia.
- Mansio, Wikipedia.
- Every figure from our own map is worked out from the datasets on the data sources page (checked against Itiner-e version 2024 1.3).