Looking down into the sunken Osirion at Abydos from the desert above, with megalithic walls and pools of water

ABYDOS · UPPER EGYPT

The Osirion at Abydos.
Egypt’s strangest temple.

A sunken stone structure behind the Temple of Seti I, built from huge blocks with no carvings, sitting in groundwater. It’s normally closed. I got inside with the UnchartedX Egypt tour.

UNCHARTEDX EGYPT TOUR · TEMPLE OF SETI I

OCTOBER 20, 2021 · ABOUT AN HOUR INSIDE

THE SHORT VERSION

What is the Osirion?

The Osirion (also spelled Osireion) is a sunken stone structure directly behind the Temple of Seti I at Abydos, in Upper Egypt. It’s built from enormous blocks, almost none of them carved, and its floor sits down at the water table, so much of it is flooded.

Egyptologists date it to Seti I, around 1290 BC, and see it as a symbolic tomb for the god Osiris. But it looks nothing like the temple next to it, and that’s why people like Ben van Kerkwyk of UnchartedX think it might be much older.

Is the Osirion older than the Temple of Seti I?

Officially, no. Standing in it, it sure looks like it. The Seti I temple is all fine carved art. The Osirion is plain megalithic blocks, set much lower in the ground. My take: the Egyptians may have found it while building Seti’s temple and then built the long decorated hallway to reach it. Nobody can prove that either way yet.

It looked exactly like the work of the same builders as the Khafre Valley Temple at Giza. That was my first thought when I walked in.

Osirion quick facts

LOCATION

Behind the Temple of Seti I, Abydos, Upper Egypt

ALSO SPELLED

Osireion

OFFICIAL DATE

Reign of Seti I, about 1290 BC (19th Dynasty)

BUILT FROM

Huge sandstone and limestone blocks, with 10 granite pillars in the central hall

ENTRANCE

A 69 m (226 ft) sloping passage carved with Book of Gates scenes

WATER

Groundwater fills the channels; the deepest part is over 10 m (34 ft)

ACCESS

Usually closed. Most visitors only see it from above

Measurements from published excavation records. Everything else is what I saw on my visit in October 2021.

Getting in

A long way
down.

You don’t just walk into the Osirion. It sits far below the desert behind the Seti I temple, and you reach it through a very long, dusty hallway.

Tour group walking down sandy stone steps toward the Osirion entrance passage
Heading down toward the passage

We went down a set of sandy stone steps to the opening of the entrance passage. It’s a strange feeling, walking down into the ground to reach a temple.

Tour group walking through the long, dusty entrance corridor to the Osirion
The dusty entrance corridor

Then a very long hallway. With a whole tour group moving through, the dust just hung in the air under the lights.

Carved Book of Gates scene with a sun boat on the wall of the Osirion entrance passage
Book of Gates scenes on the walls

This passage is Seti-style work: carved scenes and hieroglyphs the whole way, including baboons raising their arms to the sun.

TWO BUILDING STYLES

ONE SITE

Why it looks
so much older.

The difference is obvious the moment you step through the door.

THE HALLWAY

Art on every wall.

The entrance passage is about 69 meters long and decorated like the rest of Seti’s work, with scenes from the Book of Gates, the journey of the sun through the underworld. Priests even left graffiti in it centuries later calling the place the ‘secret place of the underworld’ of Seti I.

Carved baboons raising their arms on the wall of the Osirion entrance passage
Baboons carved in the entrance passage

THE DOOR

Then everything changes.

At the doorway the art stops. You walk under a huge stone lintel and from there it’s just giant blocks, set much lower in the ground, with no art on the walls. It feels like two different projects from two different eras, joined by that hallway.

THE HALLWAY LOOKS LIKE SETI. THE OSIRION DOESN’T.

Tour group gathered under a massive stone lintel at the doorway into the Osirion
The doorway into the Osirion

THE BLOCKS

Same builders as Giza?

The walls are made of massive blocks fitted tight, with small filler stones tucked into the joints. My first thought was that it looks exactly like the Khafre Valley Temple at Giza: the same plain, giant-block style, with granite pillars and no inscriptions.

Megalithic blocks in an Osirion wall with small filler stones fitted into the joints
Megalithic blocks with filler stones
The central hall of the Osirion seen from above, with its rows of massive stone pillars and walkways

THE CENTRAL HALL

Ten giant pillars on an island.

The middle of the Osirion is a raised platform surrounded by water, lined with ten huge granite pillars. Seven are single pieces and three are made of two stacked pieces. The granite roof beams that once sat on top are mostly gone or lying broken in the water.

THE BIG QUESTION

Who built
the Osirion?

Here’s the official story, the case for something older, and what I think after standing in it.

The official story

Flinders Petrie and Margaret Murray uncovered the Osirion in 1902–03. Later excavations by the Egypt Exploration Society found Seti I’s name carved in it many times, including an inscription that reads ‘Menmaatre is beneficial to Osiris’. Menmaatre is Seti I’s throne name. So the mainstream view is that Seti built it as a cenotaph, a symbolic tomb, for Osiris.

The case for older

It doesn’t look like anything else Seti built. It sits far lower than the temple’s foundations, the stonework is plain and megalithic, and kings often carved their names onto older monuments. Even in ancient times people weren’t sure: the Greek geographer Strabo visited around 2,000 years ago and guessed it was built by a much earlier king.

What I think

It definitely looks much older. Completely different construction, set lower into the ground, no artwork on the walls. Then there’s the hallway, which is Seti-style work with art everywhere. That fits the idea that it was already there, they found it while building the Seti I temple, and they built the hallway to get to it. Take a look and decide for yourself.

Single-piece and two-piece stone pillars in the central hall of the Osirion
Single and double pillars in the central hall
Corner of the Osirion built from huge stacked megalithic blocks with no carvings
Plain megalithic blocks, no carvings

69 m

sloping entrance passage

10

granite pillars in the central hall

17

small side chambers

10 m+

depth of the water in the deepest part

THINGS I NOTICED

Doors, holes and water.

Side chambers with hinge holes

Along the walls are small side chambers, each with a doorway. Above the doorways are hinge holes cut into the stone, and they’re big. If they held doors, those were thick, heavy doors.

But that doesn’t work so well, because there’s only a narrow strip of stone to stand on in front of the chambers, with the water right there. Where would you stand to swing a door that heavy?

THE HINGE HOLES ARE BIG. THE LEDGE IN FRONT IS NOT.

Row of side chamber doorways along a narrow stone ledge and green water channel inside the Osirion
Side chambers along the water channel
A large hinge hole cut into the stone ceiling above a side chamber doorway in the Osirion
Hinge hole above a doorway
Close-up of a round hinge socket cut into the stone above an Osirion doorway
Close-up of the hinge socket
A visitor walks the narrow ledge past a metal footbridge over the green water in the Osirion
Not much room to walk
The author standing in the doorway of an Osirion side chamber for scale
Me in a side chamber doorway, for scale

A drilled hole

In one of the cut-outs in the floor there’s a small round hole drilled sideways straight through the stone. What could that have been for?

So much dirty water

There’s a lot of murky green water, sometimes with an oily film on top. No smell, surprisingly. Maybe the water level is higher now than it was back then. Maybe there was no water at all when it was built.

Fallen roof

Huge pieces of the roof lie broken in the central hall. One chamber still has its pitched stone roof, with plain walls and no decoration.

A small round hole drilled horizontally through stone at the edge of a cut-out in the Osirion floor
The drilled hole
Murky water with an oily film around a fallen block inside the Osirion
Oily film on the water
Collapsed roof blocks lying broken inside the Osirion
Collapsed roof blocks
Megalithic Osirion walls rising straight out of the green water channel
Walls rising out of the water
Inside an Osirion chamber with a pitched stone roof and plain undecorated walls
Chamber with a pitched roof
Looking up at huge streaked stone ceiling blocks at the Osirion entrance
Ceiling blocks at the entrance

VISITING

Can you go inside the Osirion?

Usually not. There’s literally a sign at the edge that says ‘The Osirion Closed’. Most people visiting the Temple of Seti I only look down into it from above, which is still worth doing.

Our group got in because it was part of the UnchartedX Egypt tour with Ben van Kerkwyk, which arranged special access. We spent about an hour inside. If you go on your own, plan on seeing it from the top, and spend your time in the Temple of Seti I, which has the famous Abydos King List.

IF YOU REALLY WANT TO GET IN, GO WITH A TOUR THAT ARRANGES ACCESS.

A sign reading The Osirion Closed at the edge of the site in Abydos
The sign says it all
Overview of the Osirion from above with stairs, walls and water-filled sections
The view most visitors get
The author standing above the Osirion with the central hall behind him
Up top after the visit
UnchartedX Egypt tour group gathered on the platform inside the Osirion
Our UnchartedX group inside the Osirion

Watch

Ben van Kerkwyk
inside the Osirion.

Ben of UnchartedX has filmed the Osirion and the Seti I temple in detail. This video starts at the Osirion part.

Frequently asked QUESTIONS

Osirion FAQ.

What is the Osirion?

The Osirion, also spelled Osireion, is a sunken megalithic structure behind the Temple of Seti I at Abydos, Egypt. It’s built from huge plain stone blocks around a central hall with ten granite pillars, and much of it is flooded with groundwater.

Where is the Osirion?

Directly behind the Temple of Seti I at Abydos in Upper Egypt, north of Luxor. You see it from the back of the temple, looking down.

Who built the Osirion?

Egyptologists credit Seti I, around 1290 BC, because his name is carved in it many times. Others think it’s much older, because its plain megalithic style and depth are so different from the Seti I temple, and kings often added their names to older buildings.

How old is the Osirion?

Officially about 3,300 years old, from the reign of Seti I. Some researchers argue it could be far older, but there’s no confirmed evidence for an earlier date.

Why is the Osirion called Osireion?

Both spellings are used. Osireion is common in academic writing, and Osirion is used by UnchartedX and many travelers. The name comes from Osiris, the Egyptian god of the afterlife.

Why is there water in the Osirion?

Its floor sits down at the water table, so groundwater fills the channels. The deepest part is more than 10 meters deep. The water level may be higher today than when it was built.

Can you go inside the Osirion?

Usually not. It’s closed to the public, and most visitors view it from above. Some specialist tours, like the UnchartedX Egypt tour, arrange access to go inside.

Is the Osirion like the Khafre Valley Temple?

They share the same plain, massive-block style with no inscriptions, which is why many visitors compare them. That’s the first thing I thought when I walked in.

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