Unlike many older German universities, the buildings of Ruhr-University are all centralized on one campus, located south of Bochum city. The Faculty of Medicine includes several university clinics that are located at different centres in Bochum and the Ruhr area. A major facility for patient care is the University Hospital/Knappschaftskrankenhaus in the district Langendreer of Bochum. Internationally renowned experts in their respective fields are professors Wolff Schmiegel in oncology and Burkhard Dick in ophthalmology. The centralized university campus architecture is comprised almost exclusively of the 1960s architecture style referred to as Brutalism, consisting of 14 almost identical high-rise buildings. One striking feature of these buildings is that although their roofs are all at the same apparent height (sky level), the absolute heights of the buildings vary in accordance with their placement on the undulating landscape in which the university is located: the campus is at the edge of a green belt on high ground adjacent to the Ruhr valley.