Almost all of the monumental round-oval structures have two longer obelisks (which can reach a length of 5.5 meters) and these obelisks are surrounded by a number of stone walls which can be dated to one or different phases. Within these walls, several T-shaped obelisks are arranged at regular intervals. Three of the megalithic structures (C, D and E) were built on a carefully corrected natural limestone plateau. Of these, the upper structure of the E Structure has not survived to the present, the two central obelisks of the C and D Structures were found in carefully processed platforms on the natural limestone bedrock. There is still a controversy over whether or not the roofs of round-oval monumental structures are visible or whether the sky is visible. At present, the hypothesis that the buildings are covered by a roof is likely to be seen according to architectural studies. Nevertheless, it should not be overlooked that during the long ya˛an life cycles id of the structures, different periods can be experienced in which their superiors are both open and closed.
The most preserved monument that has been excavated to date is D Structure (Figure 3). The anthropomorphic features of the T-shaped obelisks are particularly prominent in this structure. The upper part of T is the head of the obelisk, while the trunk and legs are represented in the obelisk body. In the two central obelisks in Structure D, this is emphasized by additional anatomical elements, such as hand and arm, made in low relief. Clothing and accessories such as necklaces, belts, belt buckles and loincloths are also depicted in low relief. In accordance with the above, round-oval shaped monumental structures at Gˆbekli Tepe suggest the meeting places where the two central obelisk figures stand in the middle of the smaller it obelisk ar community.