The architecture was found in a limited exposure, between the previous excavation trenches, and consisted of several wall fragments (but couldn't be combined into a significant structure). The walls were much thicker than before (up to 1,2 m) and consisted of a more complex construction (large stones made the outer faces, smaller ones filled the space between). One wall lay across the Late Neolithic road, aligned in the same way and turned northward at the same point, so it merged into the previous wall --> the two walls were related, the second was a re-utilization of the earlier complex; the later wall belonged to a different architecture and comprised of a a retaining wall, parallel to its northward segment, and between them there was a cobble-paved area. Everything was set in foundation trenches (filled with reddish, clayey soil). The walls were carefully-made on the sides (outside coated with a clayey plaster, and over that very regular stones of an additional face were laid): The walls reflected the terrace arrangement of the settlement. The walls have been interpreted as belonging to a fortification-structure because of their thickness and construction. 
The Final Neolithic can be considered as a continuum to the Late Neolithic, the differences here lay exclusively in the evolution over time (technical skill, production scale), which was remarkable and somewhat abrupt. Maybe the changes were attributed to the emergence of a different society.   