OR 2025 will take place at Bielefeld University‘s campus (Universitätsstraße 25, 33619 Bielefeld) at the edge of the Teutoburger forest.
You can get to the campus in just 7 minutes from the city center with tram 4 in the direction of Lohmannshof. Exit the tram at the stop “Universität.”
An interactive map is available at Bielefeld University’s campus map page.