The 13,000 volume library was discovered in a depot of the Czech National Library (pictured) close to Prague
Himmler (pictured with Hitler at Berchtesgaden) also collected some of his books from the Norwegian order of Freemasons, when the Nazis invaded the country in 1940
The books were intended to be stored at Wewelsburg Castle in western Germany, the 'Black Camelot' of Nazism where Himmler created a court of SS 'knights' modelled on the legend of King Arthur and the Knights of the Round Table.
The castle today is a museum and place of remembrance. The swastika-daubed ceiling of the room where he met with his evil knights forms the centrepiece of the exhibition.
Historians are to analyse the Witches Library and a Norwegian TV company is to make a documentary about the find.