1173 On this day in history birth of louis I, Duke of Bavaria (d. 1231)
1174 Louis I, Duke of Wittelsbach was born on December - 23.
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 December - 23.
1544 On this day in history birth of anna, duchess of Saxson/wife of prince Willem of Orange (1561-71)
1548 Pieter C Bockenberg, historian (Annales Hollandiae et Zeelandiae) was born on this day in history.
1582 On December - 23 birth of severo Bonini, composer
1597 Martin Opitz, Germany, poet "Father of Modern German Poetry" was born on this day in history.
0558 On this day in history childebert, king of France (511-58), dies at about 62
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 December - 23.
0913 On this day in history death of conrad of Franconia
0918 Conrad I, East Frankish/German king (911-18), dies on December - 23.
1116 Ivo van Chartres, French canonist/bishop of Chartres/saint, dies on this day in history.
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 December - 23.