In the 12th and 13th centuries, the Templars were one of the most powerful orders of knights and protected the pilgrim and merchant routes to the Holy Land. But besides their worldly duties they knew a secret. Inge Ott mainly wrote historical books for young people, for example about the destruction of the Cathars, Napoleon's campaigns and the history of the Templars and how stonemasons from Lyon experienced them. Hardback edition. Number of pages: 467 From about 12 years.