Complex sentence: But in fact Kircher failed to decipher the true meaning of Egyptian hieroglyphs and it was left to the Frenchman Francois Champollion to finally solve the riddle through his study of the Rossetta stone during the years 1822-24.
Split into simpler sentences: But in fact Kircher failed to decipher the true meaning of Egyptian hieroglyphs. It was left to the Frenchman Francois Champollion to finally solve the riddle through his study of the Rossetta stone during the years 1822-24.