Great Pyramid of
Giza
It is the oldest, yet it is the only surviving of the Seven Ancient
Wonders. It is the Great Pyramid of Giza.

Location
At the city of Giza, a necropolis of ancient Memphis, and today
part of Greater Cairo, Egypt.
History
Contrary to the common belief, only the Great Pyramid of Khufu
(Cheops), not all three Great Pyramids, is on top of the list of
Wonders. The monument was built by the Egyptian pharaoh Khufu of
the Fourth Dynasty around the year 2560 BC to serve as a tomb when
he dies. The tradition of pyramid building started in Ancient Egypt
as a sophistication of the idea of a mastaba or "platform" covering
the royal tomb. Later, several stacked mastabas were used. Early
pyramids, such as the Step Pyramid of King Zoser (Djoser) at
Saqqara by the famous Egyptian architect, Imhotep, illustrate this
connection.
The great pyramid is believed to have been built over a 20 year
period. The site was first prepared, and blocks of stone were
transported and placed. An outer casing (which disappeared over the
years) was then used to smooth the surface. Although it is not
known how the blocks were put in place, several theories have been
proposed. One theory involves the construction of a straight or
spiral ramp that was raised as the construction proceeded. This
ramp, coated with mud and water, eased the displacement of the
blocks which were pushed (or pulled) into place. A second theory
suggests that the blocks were placed using long levers with a short
angled foot.
Throughout their history, the pyramids of Giza have stimulated
human imagination. They were referred to as "The Granaries of
Joseph" and "The Mountains of Pharaoh". When Napoleon invaded Egypt
in 1798, his pride was expressed through his famous quote:
"Soldats! Du haut de ces Pyramides, 40 siècles nous contemplent".
(Soldiers! From the top of these Pyramids, 40 centuries are looking
at us)
Today, the Great Pyramid is enclosed, together with the other
pyramids and the Sphinx, in the touristic region of the Giza
Plateau. Also in the area is the museum housing the mysterious Sun
Boat, only discovered in 1954 near the south side of the pyramid.
The boat is believed to have been used to carry the body of Khufu
in his last journey on earth before being buried inside the
pyramid. It may also serve him as a means of transportation in his
afterlife journey according to Ancient Egyptian beliefs.
Description
When it was built, the Great pyramid was 145.75 m (481 ft) high.
Over the years, it lost 10 m (30 ft) off its top. It ranked as the
tallest structure on Earth for more than 43 centuries, only to be
surpassed in height in the nineteenth century AD. It was covered
with a casing of stones to smooth its surface (some of the casing
can still be seen near the top of Khefre's pyramid). The sloping
angle of its sides is 51 degrees and 51 minutes. Each side is
carefully oriented with one of the cardinal points of the compass,
that is, north, south, east, and west. The horizontal cross section
of the pyramid is square at any level, with each side measuring 229
m (751 ft) in length. The maximum error between side lengths is
astonishingly less than 0.1%.
The structure consists of approximately 2 million blocks of stone,
each weighing more than two tons. It has been suggested that there
are enough blocks in the three pyramids to build a 3 m (10 ft)
high, 0.3 m (1 ft) thick wall around France. The area covered by
the Great pyramid can accommodate St Peter's in Rome, the
cathedrals of Florence and Milan, and Westminster and St Paul's in
London combined.
On the north face, is the pyramid's entrance. A number of
corridors, galleries, and escape shafts either lead to the King's
burial chamber, or were intended to serve other functions. The
King's chamber is located at the heart of the pyramid, only
accessible through the Great Gallery and an ascending corridor. The
King's sarcophagus is made of red granite, as are the interior
walls of the King's Chamber. Most impressive is the sharp-edged
stone over the doorway which is over 3 m (10 ft) long, 2.4 m (8
feet) high and 1.3 m (4 ft) thick. All of the interior stones fit
so well, a card won't fit between them. The sarcophagus is oriented
in accordance with the compass directions, and is only about 1 cm
smaller in dimensions than the chamber entrance. It might have been
introduced as the structure was progressing.
New theories concerning the origin and purpose of the Pyramids of
Giza have been proposed... Astronomic observatories... Places of
cult worship... Geometric structures constructed by a long-gone
civilization... Even extraterrestrial-related theories have been
proposed with little evidence in support... The overwhelming
scientific and historic evidence still supports the conclusion
that, like many smaller pyramids in the region, the Great Pyramids
were built by the great Ancient Egyptian civilization off the West
bank of the Nile as tombs for their magnificent Kings... Tombs
where Khufu, Khefre, and Menkaure could start their mystic journey
to the afterlife.