1173 Louis I, Duke of Bavaria (d. 1231) was born on December - 23.
1174 On this day in history birth of louis I, Duke of Wittelsbach
1513 On this day in history birth of thomas Smith, English diplomat and scholar (d. 1577)
1537 On December - 23 birth of king John III of Sweden (d. 1592)
1544 Anna, duchess of Saxson/wife of prince Willem of Orange (1561-71) was born on December - 23.
1548 On this day in history birth of pieter C Bockenberg, historian (Annales Hollandiae et Zeelandiae)
1582 Severo Bonini, composer was born on December - 23.
1597 On this day in history birth of martin Opitz, Germany, poet "Father of Modern German Poetry"
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 this day in history.
0913 Death of Conrad of Franconia on December - 23.
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 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