I believe the answer is a sculpture. I hope this helps!
<span>The attacker claimed he and Newman completed "Who is afraid of Red, Yellow, and Blue" together and he hated how the restoration was done. However, it wasn't up when he went, so he took out a knife and destroyed Cathedra. I dont remember his name im sorry </span>
Some of his most popular compositions include The Well-Tempered Clavier, Toccata and Fugue in D minor, Air on the G String, Goldberg Variations, Brandenburg Concertos and many more, a lot of which were lost or not finished.
I hope this helps you and have a great day!! :)