Fields of knowledge interested in the study of aesthetics have been mostly philosophy, art, architecture, and the behavioral sciences. Each field has dealt with aesthetics from their own perspective, serving their own purposes, and reflecting their own world views and ideologies. Each field has therefore defined aesthetics in distinct ways reflecting their approach to aesthetics. Nevertheless, many similarities do occur among these different approaches, pointing toward several common issues. This course introduces the study of aesthetics by defining the term and discussing the reasons why the study of aesthetics is important. The discussion brings up the differences as well as the similarities among the various fields of knowledge. However, the emphasis is placed upon the contributions of the behavioral sciences in particular on architectural and urban aesthetics, thereby pointing towards innovations in the study of aesthetics. The interest in studying aesthetics raises a number of important questions. Who, what, why, and how to study aesthetics becomes the focus of attention.