The team used terahertz imaging to peer through the corrosive layer, which revealed more than can be seen by the eye.
Experts analyzing a French funerary cross have been able to peer underneath centuries of corrosion to reveal its original inscription. Using a technology called terahertz imaging, they were able to observe a clear picture of the Lord’s Prayer, written in Latin. The team suggested that the technology they employed could be a boon to subsequent analyses of historical artifacts.
The work was conducted by an interdisciplinary team of scientists from Georgia Institute of Technology, in conjunction with Georgia Tech-Lorraine. They explained in a report from Georgia Tech that terahertz imaging was selected as a means of analysis due to its non-destructive nature. This was especially important, considering how delicate the cross had become.