Models have become a universal tool in almost all sciences, in technology and also in normal life. For example, computer science cannot do without models in constructing or in explaining and describing systems or in teaching. Modeling is often done as a craft and seems a long way off to have a scientific basis. Models are instruments that fulfill certain functions in scenarios. Therefore they stand independently between data / observations / situations and theories. In an initiative lasting for almost a decade, a discussion forum about all faculties of the CAU together with partners - such as from Rostock – developed a model concept that does not resort to phenomena, but treats models as an independent research subject. In this talk, I will introduce the developed approach to the model concept, to the art and science of the models, to the modeling as a well-founded technique in both development and also when using models and modeling as systematic work towards a culture. Illustrative examples are models from the field of databases, business processes and archeology.