Pizan solicited the Queen, presenting her in 1414 an illuminated copy of her works. In The Book of the City of Ladies, Pizan praised Isabeau lavishly, and again in the illuminated collection, The Letter of Othea, which scholar Karen Green believes for de Pizan is "the culmination of fifteen years of service during which Christine formulated an ideology that supported Isabeau's right to rule as regent in this time of crisis." Isabeau showed great piety, essential for a queen of her period. During her lifetime, and in her will, she bequeathed property and personal possessions to Notre Dame, St. Denis, and the convent in Poissy. Children The birth of each of Isabeau's 12 children is well chronicled; even the decoration schemes of the rooms in which she gave birth are described. She had six sons and six daughters. The first son, born in 1386, died as an infant and the last, Philip, born in 1407, lived a single day. Three others died young with only her youngest son, Charles VII, living to adulthood. Five of the six daughters survived; four were married and one, Marie (1393–1438), was sent at age four to be raised in a convent, where she became prioress. Her first son, Charles (b. 1386), the first Dauphin, died in infancy. A daughter, Joan, born two years later, lived until 1390. The second daughter, Isabella (1389-1409) was married at age seven to Richard II of England and after his death to Charles, Duke of Orléans. The third daughter, another Joan (1391–1433), who lived to age 42, married John VI, Duke of Brittany. The fourth daughter, Michelle (1395–1422), first wife to Philip the Good, died childless at age 27. Catherine of Valois, Queen of England (1401–1438), married Henry V of England; on his death she took Sir Owen Tudor as her second husband. Of her remaining sons, the second Dauphin was another Charles (1392–1401), who died at age eight of a "wasting illness". Louis, Duke of Guyenne (1397-1415), was the third Dauphin, married to Margaret of Nevers, who died at age 18. John, Duke of Touraine (1398-1417), the fourth Dauphin, the first husband of Jacqueline, Countess of Hainaut, died without issue, also at the age of 18. The fifth Dauphin, yet another Charles (1403-1461), became King Charles VII of France after his father's death. He was married to Marie of Anjou. Her last son, Philip, died in infancy in