became Isabella's stepson) and then to King Louis IX of France. Once the princess got older, the more she loved privacy. In November 1229, with the permission of her brother, she departed for Marlborough Castle, which became her residence; at this time, reconstruction was being completed in the castle, and King Henry III ordered the constable of the castle to allow his sister to choose any quarters she wanted. The relationship between brother and sister was very warm, and the King visited Isabella several times: he visited Marlborough during the celebration of the wedding of "the maiden Catherine" who served Isabella, and also visited his sister in 1231 and 1232 at Gloucester Castle. On 13 November 1232, King Henry III sent his personal tailor to his sister to make her a new full wardrobe. The King also celebrated Christmas with Isabella that year; he sent her three of the best dishes from his table and presented many gifts, and then for several months he sent her the items needed to equip the princess's own chapel. Provisions for Isabella and her guests were provided by "two or three worthy men" from Gloucester, while wine and venison were regularly sent to his sister by the King, who also provided one of his fish suppliers for use by Isabella. The royal chaplain, Warin, who served Isabella, was also granted to his sister by the King. In the summer of 1232, Isabella returned to Marlborough Castle. Marriage In 1234, Isabella left seclusion and settled in the Tower of London. In November, the twice-widowed Frederick II, Holy Roman Emperor at a friendly meeting at Rieti, received the advice of Pope Gregory IX to ask Isabella's hand, and in February 1235 he sent an embassy to King Henry III headed by his chancellor Pietro della Vigna. The marriage of Isabella and Emperor Frederick II was designed to strengthen the political alliance of England and the Holy Roman Empire against France. After three days of discussion, King Henry III agreed to the marriage; Isabella was brought from her quarters in the Tower to the Palace of Westminster, where she met with the ambassadors, who "declared her the most worthy of the imperial brides", put a wedding ring on her finger and greeted her as their Empress. On 22 February 1235, an agreement was signed, according to which King Henry III provided his sister with a dowry of