Matilda of Flanders is the formidable consort of William the Conqueror, yet she is relatively unknown in the story of the 1066 conquest of England.    Chief Historian Tracy Borman makes her pitch for the pivotal role Matilda played as a champion for female sovereignty, and for her contribution to arguably the most successful dynasty in medieval Europe, the Normans.     Read more about Matilda of Flanders, William the Conqueror at the building of the Tower of London.