Archaeologists unearth medieval convent’s heating system during renovations in Switzerland
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What the source said
The Jerusalem Post
“Archaeologists unearth medieval convent’s heating system during renovations in Switzerland”
Gnadental convent was built outside Basel's city wall for Franciscans around 1231, later becoming a temporary home for several orders.
Read at The Jerusalem PostReported by one source so far. It is confirmed when a second, independent source reports the same thing.