Duke Albert of Bavaria joins the Swabian League. This was a league
of imperial cities, principalities and knights focused on keeping
peace within the Holy Roman Empire, founded in 1488 at the
Reichstag of Esslingen.
Citation:
Editors. "Duke Albert of Bavaria joins the Swabian League".
The Literary Encyclopedia. First published 01 November 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=13906, accessed 19 May 2013.]