The Twelfth-Century Mikveh Discovered Under the Cologne Town Hall Square in 1956
The medieval Cologne Jewish ritual bath — a 13.5-metre-deep stone shaft sunk to reach groundwater — was rediscovered during 1956 building works in the cathedral-square excavations. It is substantially the only substantially intact 12th-century mikveh north of the Alps and substantively defines the standing archaeology of the medieval Cologne Jewish community.
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