The Historisches Lexikon Bayerns (Historical Encyclopaedia of Bavaria) is a scientific online-encyclopaedia about the history of Bavaria. It supplies information about the history of Bavaria on a scientific basis on the web and is directed at an academic audience as well as at journalists, local historians, history workshops, teachers and students. The encyclopaedia's entries are compiled by qualified specialists and are expanded continuously. The project on the era of the Weimar Republic has been almost completed. At present, work on two new special projects regarding the late mediaeval period and contemporary history after 1945 is being started.
The Historisches Lexikon Bayerns is a project undertaken by the Bayerische Staatsbibliothek (Bavarian State Library) in collaboration with the Konferenz der Landeshistoriker an den bayerischen Universitäten and with the Kommission für bayerische Landesgeschichte bei der Bayerischen Akademie der Wissenschaften.
The encyclopaedia is an autonomous project and searchable via the index on bavarikon.