Aosta is a Roman military camp that evolved into a modern Alpine mountain hub.

Countries & Cities · Published 3 October 2026 Swipe more like this →

In short: Founded in 25 BC to house retired Roman veterans, Aosta remains defined by its rigid military grid. Today, this Italian city serves as a critical transit point for trans-alpine travel, blending ancient stone fortifications with a contemporary role as the capital of the bilingual Aosta Valley region.

Established as Augusta Praetoria Salassorum by the Roman commander Terentius Varro, the city was built to secure strategic mountain routes following the defeat of the local Salassi people. Its layout was strictly functional, designed as a military encampment with a rectangular perimeter and a grid of 64 blocks. This design prioritized the control of traffic, as the city sat at the confluence of two rivers and the convergence of major mountain passes.

The city's defensive architecture remains remarkably intact. The original Roman walls, constructed from concrete and stone, still enclose the city center, reaching heights of over six meters. Visitors can still pass through the Porta Prætoria, a double-arched eastern gate from the 1st century AD that once served as the primary entry point for travelers. Beyond the walls, the Arch of Augustus, erected in 35 BC, commemorates the Roman victory that solidified control over the region.

Over the centuries, Aosta transitioned through various rulers, including the Burgundians, the Franks, and the House of Savoy. Its strategic importance persisted, eventually becoming a key stop on the Via Francigena. Today, the city maintains its role as a transit nexus, connecting Italy to France and Switzerland via the Great and Little St Bernard passes. While the Roman theatre and ancient forums serve as reminders of its imperial origins, the city continues to function as a vital administrative and transport center for the surrounding Alpine valleys.

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