Egyptology was established as an academic discipline through the research of Emmanuel de Rougé in France, Samuel Birch in England, and Heinrich Brugsch in Germany. In 1880, Flinders Petrie, another British Egyptologist, revolutionised the field of archaeology through controlled and scientifically recorded excavations. Petrie's work determined that Egyptian culture dated back as early as 4500 BC. The British Egypt Exploration Fund founded in 1882 and other Egyptologists promoted Petrie's methods. Other scholars worked on producing a hieroglyphic dictionary, developing a Demotic lexicon, and establishing an outline of ancient Egyptian history.