Structures Twenty-One and Twenty-Nine
Only the eastern end of the building, which was built c3200BC, but (we think) slightly later than Structure One, is visible although geophysical survey suggests it continues around 15 metres west of the trench edge.
A faint geophysical anomaly, 11 metres to the south, may represent the southern wall. If this is the case it suggests the building was around the same size as Structure Twelve and had similar internal features.
After Twenty-One went out of use, its eastern end wall was completely removed, possibly as a source of building stone.
A continuation of the central paved area was exposed between Structure Twelve and Twenty-Nine in 2023. Both buildings respected the paving, telling us they were contemporary – which makes Structure Twelve earlier than we had originally thought.
Originally, we thought that a second wall section, protruding from the trench edge to the west of Structure Twelve, might also belong to Twenty-Nine.
In 2021, after this section was cleaned up it was clear that its construction was inferior and more akin to the later ephemeral buildings, such as Structure Twenty-Six, to the north-east, which are contemporary with the rebuild of Structure Ten.