Sanchia's sisters Margaret, Eleanor and Beatrice were the respective wives of Louis IX of France, Henry III of England and Charles I of Sicily.

It was Eleanor of Provence who arranged a marriage between her sister Sanchia and her brother-in-law Richard, 1st Earl of Cornwall, whose first wife Isabel Marshal had died recently.

Sanchia was engaged to Raymond VII of Toulouse, but the weak part he played in recent fighting with the king of France was a good enough excuse for breaking the bond.

Beatrice of Savoy, mother of the bride, came to England to see her third daughter wedded, but her father Ramon Berenguer IV was detained by state difficulties which his wife solved by getting a loan from Henry III of four thousand marks.

The marriages of the kings of France and England and two of their brothers to the four sisters from Provence improved the relationship between the two countries that led to the conclusion of the Treaty of Paris in 1259.

His sole object was to assist in restoring prosperity to the German states; his honest desire was to rule justly and well.

It was clear to the German delegation, and to the throng of adherents and servants who swarmed into the hall to listen, that he was happy over the fulfillment of his great wish.