Doorways are more than just functional divisions of space or security barriers. Throughout the ages, architects have explored the symbolic and aesthetic values of thresholds, doors and entrances. In the past architects, such as Philippe Starck and Norman Foster, have experimented with the door to create innovative interpretations of how we move from one space to another, or from exterior to interior. This text surveys over 50 examples from around the world, using colour photographs, architectural drawings to explore the range and inventiveness of recent designs.