At the Duisburg campus, older UDE calendars and those of its predecessor institutions are available at the information desk on the 1st floor in the LK Library.
On the Essen campus, you can find older calendars in the bibliographical section on the ground floor of the Humanities and Social Sciences Library (behind the information desk). All older calendars can also be ordered via Primo. When you order older issues, they will be provided for you in the periodicals reading room on the 2nd floor of the Humanities and Social Sciences Library.
In addition, all older university calenders are available at the University Archive.