1173 Louis I, Duke of Bavaria (d. 1231) was born on this day in history.
1174 Louis I, Duke of Wittelsbach was born on this day in history.
1513 On December - 23 birth of thomas Smith, English diplomat and scholar (d. 1577)
1537 On this day in history birth of king John III of Sweden (d. 1592)
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 On this day in history death of dagobert II, king of Austrasia (676-679), murdered
0910 Death of Naum of Preslav, Bulgarian scholar on this day in history.
0913 On December - 23 death of conrad of Franconia
0918 Conrad I, East Frankish/German king (911-18), dies on this day in history.
1116 Ivo van Chartres, French canonist/bishop of Chartres/saint, dies on this day in history.
1230 Death of Berengaria of Navarre, queen of Richard I of England on December - 23.
1236 On December - 23 philippus Cancellarius, French theologist/poet (Summa Cum Laude), dies