PBS | 9:00 pm

Of the fabled Seven Wonders of the Ancient World, only the Great Pyramid of Giza still stands, even though it is believed to be the oldest monument on that fabled list. In the new episode "Decoding the Great Pyramid," veteran Egyptologists Mark Lehner and Zahi Hawass draw on their collective endeavors over a period of 42 years to present an authoritative review of what this massive tribute to the Pharaoh Khufu — and other associated smaller structures — reveal about this ancient civilization.