Duke Charles' reluctance to support him in 1471 impacted their relationship. The death of Charles in 1477 led to the 1482 Treaty of Arras; Flanders, along with the lands known as the Burgundian Netherlands, became part of the Holy Roman Empire, and France acquired the rest. Edward and his successors lost much of their leverage as a result. Cultural Edward's court was described by a visitor from Europe as "the most splendid ... in all Christendom". He spent large amounts on expensive status symbols to show off his power and wealth as king of England, while his collecting habits show an eye for style and an interest in scholarship, particularly history. He acquired fine clothes, jewels, and furnishings, as well as a collection of beautifully illuminated historical and literary manuscripts, many made specially for him by craftsmen in Bruges. These included books for both entertainment and instruction, whose contents reveal his interests. They focus on the lives of great rulers, including Julius Caesar, historical chronicles, and instructional and religious works. In 1476, William Caxton established the first English printing press in the outbuildings of Westminster Abbey; on 18 November 1477, he produced Sayengis of the Philosophres, translated into English for Edward by Anthony Woodville. It is not known where or how Edward's library was stored, but it is recorded that he transferred volumes from the Great Wardrobe to Eltham Palace and that he had a yeoman "to kepe the king's bookes". More than forty of his books survive intact from the 15th century, which suggests they were carefully stored, and are now included in the Royal Collection of manuscripts, held by the British Library. Edward spent large sums on Eltham Palace, including the still-extant Great Hall, site of a feast for 2,000 people in December 1482, shortly before his death in April. He also began a major upgrade of St George's Chapel, Windsor, where he was buried in 1483; later completed by Henry VII, it was badly damaged during the First English Civil War, and little of the original work remains. Marriage and children Edward had ten children by Elizabeth Woodville, seven of whom survived him; they were declared illegitimate under the 1484 Titulus Regius, an act repealed by Henry VII, who married Edward's eldest daughter, Elizabeth. Elizabeth of York (11 February 1466 – 11 February 1503), Queen consort of England; married Henry VII of England, mother of King Henry