 We take our perceptions for granted. We feel that we see what it is, but is this really the case? How reliable are our perceptions? This course is about the senses, with particular reference to vision and audition, and we will explore the biology behind painting and music, and some words of great masters, from the Renaissance to abstraction. We'll discuss the ideas of artists as neuroscientists and how art reveals how the brain works. From here, we'll get into philosophy, the philosophical question of the foundations of knowledge. Plato's Allegory of Decay is actually a scientific question. Is that of how can we grant knowledge and the difference between science and belief? Those are topics with quite and rather strong political and social impact today. The aim is at bringing biology and humanities together, because that's not requiring a specific background, and it gives the opportunity to learn some neuroscience, and so to go through the works of some great thinkers, scientists, musicians, artists, but from another perspective. What I bet is that next time you step into a museum, you will do it with another eyes.