Structure AB — the rock-cut pillar chamber

Structure AB is a bedrock-cut chamber, an oval about 7 × 5.3 m carved roughly 2.2 m down into the living rock (Karul's 2025 figures; earlier press accounts gave ~7 × 6 m and ~3.5 m) beside the neighbouring Structure AD. Rather than being built up from the ground, its room, pillars and channels were produced by subtraction — the makers carved the space downward and left features standing where they wanted them, so that floor, walls and pillars are one continuous piece of bedrock.

The chamber holds a cluster of tall, rounded, tapering shafts rising straight from the floor — widely described as phallic pillars. Karul's 2025 report counts ten, shaped from the rock left in place as the room was hollowed out (earlier accounts said eleven), the four at the front taller and more elaborately worked. A human head carved high on the western wall — with a protruding forehead, thick lips and a beard under the chin — is turned slightly toward the entrance stairs. A narrow porthole-like opening connects AB to Structure AD, and a serpentine channel enters from the north. Karul reports no domestic material in AB, and records that the chamber was filled in sequential stages — apparently over a short span rather than gradual silting — with large stones deliberately placed over the rear pillars to seal it.

The 2025 excavation chapter sharpens the picture. It gives AB as an oval about 7 × 5.3 m, carved roughly 2.2 m down into the bedrock — shallower than the ~3.5 m of earlier press accounts. It counts ten posts rather than eleven, shaped from the rock mass left in place as the room was hollowed out: four in a line at the front, by the head, and six at the rear. The front row stands taller (about 1.83–1.65 m), the rear posts shorter (about 1.3–1.13 m).

The most striking detail concerns the carved head itself. Karul describes a line running off the head and around toward the edges of the room like the body of a snake — so the wall-image reads as a human head continued by a serpentine body, its forehead marked with a band that may be a hairband, paint or a tattoo. The northern serpentine channel was cut so that liquid poured into it would run down into the chamber and, through the opening in the shared wall, into a pit inside Structure AD. The architecture — posts, head, channel, stairs, and the link to AD — makes AB read as one part of a larger designed whole; what the ceremony was remains the excavator's interpretation.

The room was reached by a small circular opening and a five-step descent, and Karul has described AB as having a separate entrance and exit — a second stair to the north-east probably served as the way out, making the space a designed route rather than a single doorway. That arrangement, together with the channel and the watching head, has led the excavator to interpret the chamber as a setting for rites of passage (an interpretation reported in interviews, not a settled conclusion). In talks Karul has gone further, describing liquid moving through the channel toward a pool and the transformation of those who passed through — perhaps an initiation — while stressing that the specific meaning stays interpretation. A further upright carved element, compared to the standing animal figures at other Taş Tepeler sites, is reported to have been set into the floor so as to confront anyone entering — a detail that is reporting-grade and awaits full publication.

AB reverses the logic of the better-known enclosures at Göbekli Tepe, where great T-shaped pillars were quarried, moved and raised into built rooms. Here the architecture is negative, defined by what was cut away, which is one reason Karahan Tepe is treated as a distinct achievement rather than a copy of its neighbour. The chamber belongs to the Pre-Pottery Neolithic, on the order of 11,000 years old.

It is worth separating observation from interpretation. That the shafts stand in the bedrock, that a head watches from the wall, and that a channel and staged filling exist are all confirmed. That the pillars were understood specifically as phalluses, what that symbolism meant, and that the room staged rites of passage are interpretations the excavators offer while remaining cautious. A reported winter-solstice light effect in the chamber is a contested popular claim, not peer-reviewed.

Popular writing calls this room the “Pillars Shrine” or “Pillar Room,” and pairs it with the neighbouring “Great Ellipse” (Structure AD). Those nicknames are useful shorthand, but they come from press and enthusiast coverage rather than from a full excavation report. In the project's own lettering this is Structure AB; where this page uses a nickname it is flagged as such. Karul's 2025 report is now the definitive account, and it uses the AB / AD lettering and its own measured figures — so the press “shrine → ellipse” shorthand is best read as popular labelling layered over the excavator's own.

The objects recorded for this building, gathered as one catalogue. Where a full object page exists, it is linked from the card.