The use of geological evidence for climate model evaluation is inevitable. This is clearly reflected by the status of past climatic changes in the latest IPCC Assessment Report (www ipcc.ch/). Earth System Models of Intermediate Complexity (EMICs) [Claussen et al., 2002] are designed to bridge the gap between simple, conceptual climate models and comprehensive General Circulation Models (GCMs). The big advantage of EMICs lies in their computational efficiency, which allows for long-term climate simulations over several tens of thousands of years. As such, they are reasonable tools for simulating past glacial-interglacial climatic changes. The large number of processes described in the EMICs, even though in a reduced form, enables the user to investigate interactions and feedbacks within the climate system in a broad range of sensitivity experiments.