Refurbishing of Westminster Abbey's attic turned up caches of stained glass smashed by the Nazi Blitz and Reformed Iconoclasts:
https://www.theguardian.com/culture/2016/dec/14/new-tower-will-reveal-hidden-world-westminster-abbey
What They Found in the Attic of Westminster Abbey
https://www.theguardian.com/culture/2016/dec/14/new-tower-will-reveal-hidden-world-westminster-abbey