TDIH - January 31 This Day in (Medieval) History: January 31 314 – Accession of Pope Sylvester I. 632 – Death of Saint Maedoc of Ferns, Irish Bishop. 876 – Death of Hemma of Altdorf, Queen of the Franks. 1030 – Death of William V, duke of Aquitaine. 1208 – Battle of Lena : Prince Eric of Sweden defeated King Sverker II. 1216 – Death of Theodore II, Patriarch of Constantinople. 1418 – Death of Mircea I, Prince of Wallachia. 1504 – The Treaty of Lyons : the Kingdom of France attained Northern Italy and Spain gained the Kingdom of Naples. 1512 – Birth of the future King Henry of Portugal.