This seems to be about a cathedral in Washington, D.C., not Paris. https://www.extremetech.com/extreme/208826-mysteries-of-notre-dame-cathedral-revealed-with-l

This seems to be about a cathedral in Washington, D.C., not Paris. https://www.extremetech.com/extreme/208826-mysteries-of-notre-dame-cathedral-revealed-with-lasers https://www.extremetech.com/extreme/208826-mysteries-of-notr... https://news.nationalgeographic.com/2015/06/150622-andrew-tallon-notre-dame-cathedral-laser-scan-art-history-medieval-gothic/?sf10206837=1 https://news.nationalgeographic.com/2015/06/150622-andrew-ta... Talk about Notre Dame.