Editors. "Peace of Vienna recognises Stephen Bocskai as ruler of Transylvania". The Literary Encyclopedia. First published 01 February 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=15635, accessed 24 May 2013.]
Archduke Matthias, Governor of Austria and brother of Holy Roman Emperor Rudolf II, signs the Peace of Vienna with Hungary. This agreement recognises Stephen Bocskai as ruler of Transylvania.