The project, which started in December 2020 spanned over a period of one year, was aimed at evaluating the impact of landslides and flash floods on selected cultural heritage sites in Istanbul under future climate scenarios by developing susceptibility/vulnerability maps via Geographic Information Systems. Turkey, with its 18 sites on UNESCO World Heritage List and 85 sites on tentative lists, hosts a vast array of archaeological and cultural assets. As also remarked by International Council on Monuments and Sites (ICOMOS), flash floods and landslides, which are among frequently observed and destructive natural disasters in Turkey, make risk assessment and management of cultural heritage sites, particularly in Istanbul where one-third of registered cultural properties in Turkey located, an urgent necessity. The project, in this context, directly addressed this urgent need by researching and developing a novel climate change risk assessment framework for immediate and long-term effects of climate change on cultural heritage in Turkey, specifically UNESCO World Heritage sites and the Historical Peninsula of Istanbul. Therefore, the research did set out to make contributions to the overall purpose of reaching and maintaining a more resilient and sustainable cultural heritage in Istanbul through developing a framework that can make investments more efficient and compatible with cultural heritage.