Princess Louise of Prussia in Baden, and everyone spoke with affectionate pride of their grand duke and duchess in Constance, where the couple had a summer residence. Louise was a great friend of Alice, Grand Duchess of Hesse, her sister-in-law's younger sister; i.e., Alice was the sister of Victoria, Louise's brother Frederick's wife, both sisters being daughters of Queen Victoria. The two often visited each other. In Queen Victoria's letters, she and Frederick were always referred to with pleasure or sympathy as "good Fritz and Louise of Baden". Though friends as young girls, Louise and her sister-in-law Victoria, Princess Royal ("Vicky") always had a
Beatrice of Savoy Paris, and eventually all four daughters joined their mother there for Christmas. The generally good relationship among the four sisters did much to improve the relationship of the French and English kings. It brought about the Treaty of Paris in 1259, where differences were resolved. Beatrice and all her four daughters participated in the talks. While the family was still gathered, Louis IX finally persuaded Beatrice to surrender her claims and control in Provence in exchange for a sizeable pension to be paid to her. Charles also paid back the loan henry had made to the previous count, clearing his