About 150 Jewish gravestones dating back to the 18th century have been discovered during renovation of the main market square in Poddebice, in central Poland.
An archeologist quoted in local media say they were uprooted from the Jewish cemetery by the Germans in World War II and used for construction, covered by a thick layer of concrete.
This appears to have protected them, leaving decorative painting as well as the inscriptions intact.
See pictures of the recovered gravestones here