Alexis, heir to Tsar Peter the Great of Russia, is murdered at the
instigation of his father.
Citation:
Editors. "Peter the Great's son Alexis is murdered on his father's orders".
The Literary Encyclopedia. First published 01 April 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=17222, accessed 20 May 2013.]