Joachim I Nestor was a Prince-elector of the Margraviate of Brandenburg (1499–1535), the fifth member of the House of Hohenzollern. His nickname was taken from King Nestor of Greek mythology.

European University Viadrina Frankfurt (Oder) (German: Europa-Universität Viadrina Frankfurt (Oder)) is a university located at Frankfurt (Oder) in Brandenburg, Germany. It is also known as the University of Frankfurt (Oder). The city is on the Oder River, which marks the border between Germany and Poland. With 5,200 students — around 1,000 of whom come from Poland — and some 160 teaching staff, the Viadrina is one of Germany's smallest universities (only the University of Erfurt and Jacobs University Bremen have fewer students).