Have you ever been impressed as you approached a building? Have you ever thought about why that is? Have you ever stood in front of a door and could only open it after several failed attempts? Have you ever considered what changes might be needed to that door to prevent this from happening? This introduction to architectural psychology aims to spark interest in an exciting and complex field. It seeks to raise awareness of the various facets of the relationship between people and the environment they create. It provides explanations for a wide range of phenomena and points out practical implications for design through numerous examples. The text is divided into four parts. Part I explores the theoretical background of human-environment relationships from a psychological perspective. Part II lays out.