Castello dei Paleologi – Museo Civico Archeologico

Acqui Terme's castle began as a bishop's stronghold, became the residence of the marquises of Montferrato and later a prison, and now houses the city's civic archaeological museum. Its halls trace the whole human story of the Bormida valley, from prehistoric communities to Roman Aquae Statiellae and the Middle Ages.

Why it matters

The Castello dei Paleologi is among the most substantial secular monuments of Acqui Terme and an important source for understanding the city's history. A castle on this spur is documented from 1056 — the written source calls it a "castelletto" — built as the seat of the bishops-counts who governed early medieval Acqui; from 1260 it belonged to the Paleologi, the Greek-descent dynasty that ruled the Marquisate of Montferrato. The standing fabric is younger than that history: the oldest surviving structures date to the second half of the fifteenth century, and the main body housing the museum is the reconstruction begun in 1663 after Spanish troops destroyed the fortress in 1646. Used as a prison from the early nineteenth century into recent decades, it preserves that layered biography in its fabric. The museum inside gathers the archaeological record of the region — the prehistoric and protohistoric settlements, the Roman town of Aquae Statiellae and the late-antique and medieval centuries — so that the theatre, aqueduct and thermal remains you can see around town acquire their context here.

What to notice

Begin with the building itself: a compact fortress with robust walls crowning its ascent above the town, its silhouette one of the defining views of Acqui Terme. Inside, the exhibition runs in three sections. The prehistoric and protohistoric rooms present finds from the valley's earliest communities; the Roman section is the core, displaying material from Aquae Statiellae — the forum, the theatre, the temple building, the Roman pool, the aqueduct and a fountain all belong to the same archaeological system the museum coordinates; the third section covers late antiquity and the Middle Ages, the era when the castle itself took shape. The ramparts and garden on the walls include a small botanical feature known as the Birdgarden, with plantings, artworks and archaeological pieces created when the castle garden was restored in 1995.

Context and history

The castle's documented life begins in the eleventh century, when the bishops of Acqui held temporal power alongside their spiritual office. The fortress then changed hands with the fortunes of the marquisate — held by the Paleologi from 1260, interrupted by the rule of Robert of Anjou and by the Visconti occupation of the 1430s, and passing with Montferrato to the Gonzaga and finally to direct Savoy administration in 1708 — each phase leaving the compound more courtly and less military. With its fortress role gone, the building was put to pragmatic civic uses, most notably as a prison from the early nineteenth century, a function that shaped parts of its interior into recent decades. The decision to install the civic archaeological collection here joined the city's two oldest identities: the medieval lordship embodied by the walls, and the Roman town whose objects fill the galleries. The museum belongs to the Acqui Musei system, which also interprets the Roman pool, aqueduct area and other sites.