Social power has many facets. This paper aims to illuminate some of these. First of all, it considers the general conceptual framework in which the concept of power is embedded. The author then elaborates on an analysis of the elementary concept of social power resulting in a proposal how to define power. Furthermore, the article deals with complex networks of power relations, namely constellations and structures of power. Another section focuses on some special aspects of the dynamics of power structures. Finally, the author discusses the problem of legitimation of power.