Heian period | Edo period | Meiji period | Kamakura period | Tudor period | Hellenistic period | Warring States period | Sengoku period | interwar period | Taishō period | Muromachi period | Jōmon period | Interwar period | Yamato period | Stuart period | Woodland period | The Best Damn Sports Show Period | Spring and Autumn period | Shōwa period | Second Temple period | Sangam period | Federal Board of Intermediate and Secondary Education | Early modern period | early modern period | Vedic period | ''Taishō'' period | Nara period | Migration Period | Intermediate-Range Nuclear Forces Treaty | Helladic period |
He has directed numerous excavations and epigraphic expeditions, at sites including the entire mountain of El-Hawawish (in excess of 800 Old Kingdom and First Intermediate Period rock-cut tombs), Quseir El Amarna, El Hagarsa (near Sohag), Deir El Gebrawi, Giza, as well as the Unis and Teti pyramid cemeteries at Saqqara.
The end of the First Intermediate Period is placed at the time when Mentuhotep II of the eleventh dynasty defeated the Heracleopolitan kings of Lower Egypt and reunited Egypt under a single ruler.