Treaty of Viterbo
...that the Treaty of Viterbo transferred power over the Latin Empire from the last reigning monarch to the Angevin rulers of Sicily?
...that the <b id="mwB4M"><a href="./Treaty_of_Viterbo" id="mwB4Q" rel="mw:WikiLink" title="Treaty of Viterbo">Treaty of Viterbo</a></b> transferred power over the <a href="./Latin_Empire" id="mwB4U" rel="mw:WikiLink" title="Latin Empire">Latin Empire</a> from the last reigning monarch to the <a class="mw-disambig" href="./Angevin" id="mwB4Y" rel="mw:WikiLink" title="Angevin">Angevin</a> rulers of <a href="./Sicily" id="mwB4c" rel="mw:WikiLink" title="Sicily">Sicily</a>?