Most university buildings are on the north-eastern side of Siegen, in the Weidenau district. Facilities at Haardter Berg include the Adolf-Reichwein-Straße campus, which has the largest lecture halls, the central canteen, the central library as well as a part of the centre for information and media technology. Some 500 m south-east is the Hölderlinstraße campus, which accommodates the centre for information and media technology, the central course guidance service and a departmental library. Another 400 m south, at Paul-Bonatz-Straße, is the engineering Campus, the modern-day descendant of the former engineering school. Artur-Woll-Haus on the eastern slope of Haardter Berg hill, which opened on 25 March 2003, accommodates the guest house and the externally funded research facilities.