Egyptology - The Amarna Period: Egypt's dramatic religious experiment

During the late Eighteenth Dynasty, Pharaoh Amenhotep the Fourth moved Egypt's royal residence from Thebes to Akhetaten, modern Amarna. Renaming himself Akhenaten, he altered Egypt's religion to worship the sun disc Aten above all other gods. Following his death and brief reigns by Smenkhkare and Neferneferuaten, nine-year-old Tutankhamun restored the traditional pantheon and shifted government to Memphis. Later pharaoh Horemheb ordered Akhetaten torn down and attempted to remove thirty years of Amarna history by styling himself as the immediate successor of Amenhotep the Third.

Source: Wikipedia