 On 14 November 1501 , the marriage ceremony finally took place at Saint Paul 's Cathedral ; both Arthur and Catherine wore white satin . The ceremony was conducted by Henry Deane , Archbishop of Canterbury , who was assisted by William Warham , Bishop of London . Following the ceremony , Arthur and Catherine left the Cathedral and headed for Baynard 's Castle , where they were entertained by " the best voiced children of the King 's chapel , who sang right sweetly with quaint harmony " . 
