another really incredible piece is the slave market with the disappearing bust of voltaire, which is a double image painting. he s able to show on one surface two completely different compositions. either you see the face of voltaire, or you see a slave market with two dutch merchants. we also have a painting called the disintegration of the persistence of memory, and it references dali s most well-known painting, the persistence of memory. twenty years later, he takes his original painting, and he reconstructs it as a metaphor for the atomic universe. it s one of our visitors favorite features, and it s a great way to think about dali as an artist who s constantly in transition. [music] there s a really unusual passion that dali had he wanted to paint large works. they re called the masterworks. we have eight of those in our collection, and we ve developed an ar feature so that you can actually use your cell phone, hold it up to one of these canvases, and suddenly a 30-secon