Populi Romani
An interactive atlas

Twenty peoples,
one collapsing world.

Between 200 and 500 AD the Roman Empire was less a single nation than a mosaic of cultures held together by law, language, and the legions. From beyond its rivers, a second mosaic of peoples pressed in. This is a guide to both.

20
Peoples profiled
3
Continents
300y
Period covered
9
Frontier wars
Tyrian · imperial coreSienna · southern provincesAegean · western & maritimeSand · eastern reachesParchment · the record
Part I

Peoples within the imperial frontier

Inside the Empire

Three turning points for the peoples of Rome

212 AD

Edict of Caracalla

Citizenship is extended to nearly every free person in the empire. Overnight, 'Roman' ceases to mean 'Italian' — Gauls, Syrians, Berbers and Greeks become legally Roman.

293 AD

Diocletian's Tetrarchy

The empire is split into four administrative quarters under two Augusti and two Caesars. Provincial peoples now answer to courts at Trier, Milan, Sirmium and Nicomedia, not just Rome.

380 AD

Edict of Thessalonica

Theodosius makes Nicene Christianity the state religion. The empire's pagan, Jewish and heterodox communities — Egyptian, Syrian, Anatolian — are recast overnight as outsiders within.