Aosta in half a day, six meters under the street

The one thing in Aosta you cannot see anywhere else is the megalithic area of Saint-Martin-de-Corleans, a prehistoric sanctuary dug six meters below the modern street and roofed by a museum since 2016.

Six meters down, and about 10,000 square meters wide

The excavation at Saint-Martin-de-Corleans covers about 10,000¹ square meters and lies six meters under the road surface, inside the built-up town rather than out in a field. It was in use from the last centuries of the fifth millennium BC to the early Bronze Age, then again in Roman times and the Middle Ages.

What comes out of the ground is a sequence rather than a single monument: anthropomorphic stelae, ritual pits, alignments of wooden posts, dolmen and cist tombs. The museum opened on June 24, 2016, reopened in November 2023 and was renamed MegaMuseo in February 2025.

The building itself is a piece of engineering worth a look: 9,820¹ square meters with a free span of 46.5¹ meters, because nothing may rest on the dig.

The hours and the price are not published

The MegaMuseo timetable and ticket price are not published on any page we could open and read. The regional heritage portal keeps them out of indexable text, so a visit that starts with a web search will not end with a number.

Call ahead or ask at the desk, and treat any price you find on a third party site as unverified. This page carries no admission figure for that reason.

A Roman rectangle you can walk across

Aosta was founded in 25 BC as Augusta Praetoria Salassorum, and the Roman wall enclosed 414,128² square meters with four gates. That rectangle is still the shape of the old town, which is why the walk from one side to the other takes minutes rather than an afternoon.

The grid is the practical part. Set the megalithic area at one end of your half day and the walled center at the other, and you will not double back once.

33,124 people at 583 meters, in two languages

Aosta had 33,124³ residents on May 31, 2026 and sits at 583³ meters above sea level, which is low for the valley around it and high for a regional capital. Italian and French are both official, and the town carries two names, Aosta and Aoste.

The parity comes from the special statute of February 26, 1948, and it is parity, not minority protection. Read the street plates and the notices in public offices as bilingual by law rather than by decoration. Wider picture in Valle d'Aosta and in the town page.

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