This document is the introduction to an art appreciation class. It discusses definitions of key concepts like beauty, aesthetics, and ugliness. Beauty is defined as a perceptual experience of pleasure, meaning, or satisfaction. Aesthetics is the branch of philosophy concerned with studying beauty in art. The document asks students to consider what subjects come to mind when thinking about beauty and provides examples of famous artists like Michelangelo, Van Gogh, and Goya to illustrate these concepts.