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This work presents the results of the analysis of wood charcoal remains from a roof found in Tell Qarassa North (Early PPNB), southern Syria. The analysis was carried out in 50 burnt beams found in situ, as well as in 3 flotation samples from the same structure and in a flotation sample retrieved from a post hole. The taxa selected to build up the roof were Pistacia terebinthus/palaestina, Salicaceae and to a lesser extent Amygdalus sp. The structure was composed at least of a post of Pistacia wood which supported a structure made of branches and medium size trunks orthogonally disposed. The wood structure was covered with non-woody plant parts and adobe layers. Abundant xylophagous galleries and fungi remains identified in the charcoal remains point to a deterioration of the wooden structure previous to its burning. ; Basque Government (Pre-doctoral grant Number: BFI.09.249), UPV/EHU: Research Group IT-288-07 and I+D Project: BHA2003-09685-CO2-01. ; Peer Reviewed

We present the results of the microstratigraphic, phytolith and wood charcoal study of the remains of a 10.5 ka roof. The roof is part of a building excavated at Tell Qarassa (South Syria), assigned to the Pre-Pottery Neolithic B period (PPNB). The Pre-Pottery Neolithic (PPN) period in the Levant coincides with the emergence of farming. This fundamental change in subsistence strategy implied the shift from mobile to settled aggregated life, and from tents and huts to hard buildings. As settled life spread across the Levant, a generalised transition from round to square buildings occurred, that is a trademark of the PPNB period. The study of these buildings is fundamental for the understanding of the ever-stronger reciprocal socio-ecological relationship humans developed with the local environment since the introduction of sedentism and domestication. Descriptions of buildings in PPN archaeological contexts are usually restricted to the macroscopic observation of wooden elements (posts and beams) and mineral components (daub, plaster and stone elements). Reconstructions of microscopic and organic components are frequently based on ethnographic analogy. The direct study of macroscopic and microscopic, organic and mineral, building components performed at Tell Qarassa provides new insights on building conception, maintenance, use and destruction. These elements reflect new emerging paradigms in the relationship between Neolithic societies and the environment. A square building was possibly covered here with a radial roof, providing a glance into a topologic shift in the conception and understanding of volumes, from round-based to square-based geometries. Macroscopic and microscopic roof components indicate buildings were conceived for year-round residence rather than seasonal mobility. This implied performing maintenance and restoration of partially damaged buildings, as well as their adaptation to seasonal variability. ; Research is sponsored by the former Spanish Ministry of Science and Innovation (MICINN, HAR2011-21545-C02-01 The last hunter-gatherers and the first producing societies in Central and Southern Syria), the Ministry of Culture Spanish Institute of Cultural Heritage (Excavations Abroad) and the French Ministry of Foreign and European Affairs. A. Balbo has worked on this paper on contracts from JAEDoc, SimulPast Consolider and European Social Found. A. Arranz has the financial support of the Basque Government (Pre-doctoral grant Number: BFI.09.249). L. Zapata is a member of Research Group UPV/EHU IT-288-07 (Basque Government), UFI11/09 Cuaternario of the UPV/EHU and Project HAR2011-23716 (I+D+i). She is also funded by the Programa de Movilidad del Personal Investigador del Gobierno Vasco 2012. C. Lancelotti has worked on this paper on a contract from AGRIWESTMED (European Research Council funded). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript. ; Peer reviewed