Several theories have been put forward which relate our aesthetic preferences to our biological and evolutionary programming. These theories suggest that upon entering a space we evaluate it in terms of its potential risks and rewards from a survival perspective.This thesis seeks to investigate these theories of biological aesthetics with respect to architecture. Four theories that can be united under the term Habitat Theory will be critically examined in order to derive a set of principles to inform the design process from an architectural perspective. These principles will then be employed in a critical analysis of the Chapel by Friis and Moltke, on the grounds of Sygehus Syd in Aalborg.