Hi, I have been a writer and contributor mainly to the German Wikipedia since 2005. On the German Wikipedia, I mainly write about (late) antiquity and have authored close to 300 articles, some of which have been elected featured articles. I am also a sysop on the German Wikipedia as well as the German Wikisource, where I started a project to digitize Paulys Realencyclopädie der classischen Altertumswissenschaft (RE, cf. project site). In this connection I am also active on Wikidata. In the English Wikipedia, I only contribute from time to time.