Isaac I
... that two years after winning the throne of the Byzantine Empire in battle, Isaac I voluntarily abdicated and retired to a monastery?
... that two years after winning the throne of the <a href="./Byzantine_Empire" id="mwBI4" rel="mw:WikiLink" title="Byzantine Empire">Byzantine Empire</a> in battle, <b id="mwBI8"><a href="./Isaac_I_Komnenos" id="mwBJA" rel="mw:WikiLink" title="Isaac I Komnenos">Isaac<span id="mwBJE" typeof="mw:Entity"> </span>I</a></b> voluntarily abdicated and retired to a monastery?