 Since 1995, the "Paul Klee-Archiv" (Paul Klee archive) of the University of Jena houses an extensive collection of works by Klee.It is located within the art history department, established by Franz-Joachim Verspohl.It encompasses the private library of book collector Rolf Sauerwein which contains nearly 700 works from 30 years composed of monographs about Klee, exhibition catalogues, extensive secondary literature as well as originally illustrated issues, a postcard and a signed photography portrait of Klee.