Anne de Mortimer, Countess of Cambridge was the grandmother of the last of the Plantagenet dynasty whose defeat at Bosworth Field marked the end of what in England?
Richard III of England Richard III (2 October 1452 – 22 August 1485) was King of England from 1483 until his death in 1485, at the age of 32, in the Battle of Bosworth Field. He was the last king of the House of York and the last of the Plantagenet dynasty. His defeat at Bosworth Field, the last decisive battle of the Wars of the Roses, marked the end of the Middle Ages in England. He is the subject of the historical play "Richard III" by William Shakespeare.
Judith of Flanders Judith of Flanders (or Judith of France) ( 843 – c. 870) was queen consort of Wessex and countess consort of Flanders. She was the eldest daughter of the West Frankish King and later Holy Roman Emperor Charles the Bald and his wife Ermentrude of Orléans. Through her marriages to two Kings of Wessex, Æthelwulf and Æthelbald, she was twice a queen. Her first two marriages were childless, but through her third marriage to Baldwin, she became the first Countess of Flanders and an ancestor of later Counts of Flanders. One of her sons by Baldwin married Ælfthryth, a daughter of Æthelbald's brother, Alfred the Great. She was also an ancestor of Matilda of Flanders, the consort of William the Conqueror, and thus of later monarchs of England.