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Chapter 16
While on their way to Flanders, the newlyweds were captured by Joan's first cousin Louis of France (the future Louis VIII), eldest son of King Philip II. The French prince intended to recover a large portion of the territory that he considered as belonging to his late mother's dowry, including the Artois that Joan's father had taken back by force after the death of Louis' mother in 1190.

On 1218, the Holy Roman Emperor, Frederick II would marry Margaret of Flanders as negotiated by Theresa of Portugal, Margaret a woman who was debauched by Bouchard of Avesnes so that an alliance between the Counts of Flanders and the Holy Roman Emperor would have an alliance, Avesnes has not brought a child with Margaret and that union would force Louis VIII to release Joanna of Flanders and Ferdinand to avoid a german takeover of Flanders but that would not be successful as Joanna of Flanders would die on 1222 without children.

On 1220, Holy Roman Emperor, Frederick II would leave Sicily to his son, Henry I of Sicily and his daughter in law, Margaret splitting the German and Sicilian realm leaving his other son, Frederick as the heir to his other aspirations as planned from the beginning.

Margaret, Countess of Hainault and Flanders would have three healthy surviving children named Baldwin, Joanna and Adela and during that time the Holy Roman Emperor would decide to strengthen his alliance with Ireland by marrying his daughter to Henry I of Ireland, son of the usurper King John.

On the death of the Margaret, a marriage between Joanna of England and Frederick II which would have issue to end the support and alliance of Ireland and the Holy Roman Empire on 1233 after the death of Empress Margaret, Countess of Flanders and Hainault, the marriage would produce two children, Conrad, Duke of Swabia(1240) and Margaret, Landgrave of Thuringia(1242).

On his death on 1249, Frederick II would have firmly put his children and kin on Sicily and Flanders and have secured on his kins future.

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