Workers
removed graffiti inside the pyramid, repaired cracks and cleaned the
walls of salt residue, the Supreme Council of Antiquities said on
Thursday.
The council said visitors increase humidity inside the
pyramids through breathing and perspiration, which deposits salts on
the plaster and ruins the walls.
The giant stone structure was
built for the 4th Dynasty King Khafre (2575-2551 BCE), known as
Chephren by the Greeks. It measures nearly 216m on each side and was
originally 143m high.
Since 1995, the council has closed one pyramid at a time for
restoration.
The statement said the third and smallest pyramid, Menkaure
(Mykerinus), will now be closed for a year.
The oldest pyramid of the group was built for Khufu (Cheops),
the
second king of the 4th Dynasty. Called the Great Pyramid, it is the
largest, with the length of each side measuring 230m and its original height 147m.