2022: The Celtic predecessor settlement was found
In 2022, excavations were carried out for the first time from the beginning of March to mid-November. Since 2018, the archaeologists had suspected a Celtic settlement as a predecessor to the buildings erected in Roman times. There was great joy when this assumption was confirmed. A Celtic defence wall covering an area of at least 20 hectares and several pre-Roman wooden building structures were discovered. Other buildings located under the Celtic defence wall turned out to be even older. The oldest traces of settlement on the Haselangerwiese date back to the Bronze Age, as proven by C14 analyses.
It was also possible to determine the total extent of the Roman baths. Attached to the 300 m² bath building was a courtyard area as well as potential tabernae, which now give a floor area for the bath complex of just under 700 m².