In a grisly confirmation of the impossibility of completely destroying a human body by fire, the bones and teeth of two children, aged two and six, have been found in a home-made outdoor furnace in Spain. Temperatures in it were estimated at around 800C. Gilles de Rais was supposed to have burned multiple bodies in a large fireplace which would never have attained these temperatures.
Full story here .
This issue was addressed in an earlier blog post, A very strange omission.