It is heartbreaking to see the flames soaring above Notre Dame de Paris cathedral. Such beauty destroyed, centuries of work by countless architects, artists, and craftsmen, consumed. It is the cradle of Western polyphony. It is where Perotin, Leonin, and other anonymous medieval composers heard their music sound against the stone walls, changing Western music forever.
You may also wish to see my post Christmas 1198.
Image attribution: The north transept rose stained glass window at Notre Dame, Paris. Photograph by Oliver J. Mitchell via Wikimedia Commons [CC BY-SA 3.0]. https://commons.wikimedia.org/wiki/File%3AThe_north_transept_rose_at_Notre-Dame_de_Paris.jpg