At first it seems odd to speak of something like normativity already within the realm of perceptual experience. Normativity obviously seems to be a concept of higher order that refers to the field of ethics, namely to the question of how we might define a good life or society and what norms should be implemented to realize it. But if one traces the historic-cultural roots of the term, one can find that the term norm stands for an angular measure or guideline in the practical context of ancient architecture (cf. Hoffmann, 1984; Kudlien, 1984). Here a norm is an arbitrary determination or fixation, for example a foot or a yard, which is then used as a standard measure to unify construction works. According to its history, a norm seems to be something that develops out of practical motivations to facilitate cooperation and intersubjective communication.