Barbara Baths

The Barbara Baths (Barbarathermen) are the remains of a massive Roman bath complex in Trier (Augusta Treverorum), Germany, built in the 2nd century AD. Sprawling over 42,000 square metres, they were the largest Roman baths north of the Alps. The complex featured heated rooms with a two-storey hypocaust system, underground service tunnels, furnaces, and pools. The baths remained in use through the 4th century when Trier had roughly 75,000 inhabitants, but fell into disuse after Frankish attacks around 410-435 AD. The site was later repurposed as a medieval monastery dedicated to Saint Barbara, then demolished in 1610 for materials to build a Jesuit college. Now a UNESCO World Heritage Site, the underground tunnels remain accessible to visitors.