I was hoping we’d get more info on this one from the Barcelona Reporter (a few days old already):
It seems the baths fell into disuse as the Roman city became busy and eventually became a habitat area, and a first dating points to the late start of V or VI century
Archaeological find Roman baths unearthed in Tarragona, but nothing yet
The earth works being carried out on Nau street, to replace the various public services, provided the new archaeological find, the Roman baths are located near Tarraco square Tarragona, reported local sources.
It seems the baths fell into disuse as the Roman city became busy and eventually became a habitat area, and a first dating points to the late start of V or VI century.
The remains are in good condition, and were just over one metre under the surface, it used hypocaust-heating with walls and pavement covered in opus signinum soil-mortar of lime and sand mixed with Small fragments of silicate rock.
The dating suggest something a bit outside of our purview, but we should note that we were previously aware of bath structures at Tarraco … see, e.g., The Tarraco Port Area Public Baths (the English translation of the conclusions follows the Spanish title page)
via Archaeological find Roman baths unearthed in Tarragona | Barcelona Reporter.