Side-by-side photos of a building before and after its destruction

(Left): People have lived in the distinctive mudbrick and gypsum buildings of the Old City of Sanaa, Yemen, a UNESCO World Heritage site, since at least the 11th century.  © 2013 Rod Waddington/Wikimedia Commons. (Right): The bombing of the Old City of Sanaa by Saudi and UAE-led coalition forces in 2015 killed, injured, and displaced residents and damaged the fragile ancient building materials. The loss of cultural heritage also destroyed global and local history and a site meaningful to the community.

© 2016 Mohammed Huwais/AFP via Getty Images