In 2020 the Kórnik Library’s collections were supplemented with new documents connected with the beginnings of the Protestant parish in Bnin. The present article presents the time of formation and the first years of functioning of evangelical community in Bnin, which was one of the biggest communities in Greater Poland (excluding Poznań) for more over 150 years. After a brief introduction, the following part describes upon mentioned sources the establishing of community and construction of the first Lutheran church in Bnin with its buildings. Finally, the annex contains biographies of the first five pastors in Bnin and source edition of these documents.