English: Slides of our presentation at Wikimania 2017 in Montréal about building a lasting cooperation between an University, WMDE and the german community of Wikipedians. Talk held by Marcus Cyron (Wikipedian, Wikiproject Ancient History), Martin Rulsch (WMDE, Ideenförderung) & Christian Vater (University of Heidelberg, CRC 933 "Material Text Cultures"). Title: "How to Build a Cooperation?�After Two Years — The University of Heidelberg, the CRC 933 “Material Text Cultures”, the Wikipedia and it’s Community", Talk held at Wikimania 2017, Montreal.