1173 Louis I, Duke of Bavaria (d. 1231) was born on this day in history.
1174 On December - 23 birth of louis I, Duke of Wittelsbach
1513 Thomas Smith, English diplomat and scholar (d. 1577) was born on December - 23.
1537 King John III of Sweden (d. 1592) was born on this day in history.
1544 On this day in history birth of anna, duchess of Saxson/wife of prince Willem of Orange (1561-71)
1548 On this day in history birth of pieter C Bockenberg, historian (Annales Hollandiae et Zeelandiae)
1582 On December - 23 birth of severo Bonini, composer
1597 On December - 23 birth of martin Opitz, Germany, poet "Father of Modern German Poetry"
0558 Childebert, king of France (511-58), dies at about 62 on December - 23.
0679 Death of Dagobert II, king of Austrasia (676-679), murdered on this day in history.
0910 Death of Naum of Preslav, Bulgarian scholar on this day in history.
0913 Death of Conrad of Franconia on this day in history.
0918 On this day in history conrad I, East Frankish/German king (911-18), dies
1116 On December - 23 ivo van Chartres, French canonist/bishop of Chartres/saint, dies
1230 On December - 23 death of berengaria of Navarre, queen of Richard I of England
1236 Philippus Cancellarius, French theologist/poet (Summa Cum Laude), dies on this day in history.