The Collegium Polonicum is a joint research and academic institution of the European University Viadrina and the Adam Mickiewicz University of Poznań. Among other things, it is the seat of a German-Polish research institute and houses the Karl Dedecius Archive. In addition to the university, it is also a venue for alternating exhibitions, conferences and workshops. The Collegium Polonicum is located in a prominent building directly by the river Oder. Its publicly accessible roof terrace offers a unique view over Frankfurt's old town and the Oder landscape. The connection between Frankfurt (Oder) and Słubice is clearly noticeable from this point. The signposted path to the viewing platform leads through the interior of the award-winning building, which opened in 1998. Formerly this spot featured a silk factory built by order of Frederick II in the mid 18th century.