A RESEARCH PROJECT ON THE NEOLITHIC TREE REMAINS UNEARTHED FROM THE YENIKAPI EXCAVATION SITE IN ISTANBUL, TURKEY Dogu Dilek1, Kose Coskun 1, Hizal Tirak Kamile 1, Yilgor Nural 1, Kiziltan Zeynep 2 1 Forestry Faculty, Istanbul University, Istanbul, Turkey, addogu@istanbul.edu.tr, ckose@istanbul.edu.tr, ktirak@istanbul.edu.tr, yilgorn@istanbul.edu.tr; 2 Archeological Museums of Istanbul, Istanbul, Turkey, zeynep.kiziltan@hotmail.com During the excavations of the Marmaray Rail Tube Tunnel Project in Yenikapi, Istanbul, Turkey, countless the Byzantine and Ottoman period archaeological remains, an ancient Byzantine Port, Istanbul’s oldest city wall, a Byzantine Church, a large number of sunken ships and thousands of findings were unearthed during excavations at the Yenikapi site. With the progress of the archeological excavations, important findings that will shed light on the history of Istanbul were encountered. A great number of Neolithic period tree remains that took place upright position and connected to the soil with their roots were also found from 8.5 m below the sea level during the excavations of the bog realized for the first time in Turkey (Fig. 1). A research project has been recently started to identify the wood species and evaluate in detail some properties and wood structure of tree remains. This paper will give a brief introduction of the project on the wood samples from Neolithic period. In the project, macroscopic properties, water content, and density in volume were determined in the wood samples. Nearly twenty wood species were identified as Fraxinus spp. Detailed examinations are in progress to evaluate the anatomical, chemical and microbiological properties of the wood samples. In the project, anatomical wood properties will be determined for identification of the tree species. Microscopic investigations on stained and unstained sections to detect cellulose and lignin, solubility analyses to determine extractives content, ash content and elemental analysis with SEM-EDX will be also carried out to determine chemical properties. The identification of wood remains can provide information about wood species grown in that area, life conditions of the people lived during that period, purpose of the using of trees, as well as the prevalent climate conditions in the region. Microbiological and chemical investigations by microscopic Fig. 1 Neolithic tree remains methods are expected to give valuable information on the type and degree of microbial degradation occurred likely in the wood specimens unearthed. The results of the project will shed important light on the science of archaeology, history, wood anatomy, mycology, wood chemistry, wood conservation and climatology. remains remains Key words: Archaeological wood; Neolithic age, Ultrastructural wood anatomy