Editors. "Maximilian I recognises Perkin Warbeck as King of England". The Literary Encyclopedia. First published 01 November 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=13925, accessed 25 May 2013.]
Holy Roman Emperor Maximilian I recognises Perkin Warbeck as King of England. Although most probably Flemish in origin, Warbeck claimed to be Richard of Shrewsbury, 1st Duke of York, the younger son of Edward IV, who was imprisoned in the Tower along with his brother Edward V under the kingship of Richard III.