The famous scientist, member of the French Historical Association Robert Ambelain recreates in his book an impressive picture of historical dramas and tragedies, political passions that raged in medieval France, reveals the true motives of the actions of the main characters, lifts the curtain on many secrets and secret, often criminal, methods, which these figures used to achieve their cherished goals. Relying on a wide range of sources, including the secret archives of the Vatican, the author exposes the mechanism for creating a number of historical legends and falsifications, trying to restore historical truth. The book is illustrated and addressed to a wide range of readers interested in history European Middle Ages.