Mosul has been freed from the clutches of terrorists since 2018, yet the city remains in serious need of reconstruction and redevelopment. The current study attempts to determine whether the fragments of damaged structures can be used in the reconstruction of the old city of Mosul, as well as its economic, cultural, and civilizational feasibility. Old-heritage materials have been categorized into four primary categories, which can be used to avoid confusion while disposing of them. The first category includes antique art elements such as struts, gypsum arches, door frames, and windows, the majority of which were less than 200 years old. The second category included items that were more than 200 years old and were discovered in a few locations, including the Great Mosque of Al-Nuri and the Al-Tahera Church. The third category consists of irregularly shaped stone building materials that were extensively employed in the construction of home walls and ceilings and have survived their engineering characteristics for decades. There are two primary types of stone building materials: limestone and gypsum stone. Finally, plaster, a once-common binder, produced enormous quantities of recyclable materials as well as the new mortar that might be utilized in rebuilding. These significant old-heritage materials went unnoticed and were handled haphazardly. Many of them were removed by massive bulldozers, resulting in the dilemma of their destruction and the search for places to discard them. Recycling these old-heritage materials, according to the study, will help to preserve the irreplaceable artifacts embossed with magnificent ornamentation, sketches, and inscriptions. Obtaining antiquities buried beneath these structures that could be 800 years old or older. Taking advantage of low-cost, high-economic-feasibility building materials and abandoning the idea of destroying and discarding them, which costs a lot of money and pollutes the environment. The geotechnical assessment of categories 1, 3, and 4 revealed that they are recyclable. Category 1 showed that the percentage of damage caused by nature does not exceed 1% and 7% as a result of the war. In categories 3 and 4, the proportion of natural damage caused by weathering does not exceed 1%, while the percentage of natural damage caused by war does not exceed 3%.

Building stones have various mineralogical, textures, microstructures, and physical and mechanical properties. Limestone, dolomite, and gypsum stone samples were taken from the old city of Mosul, which was destroyed due to the liberation operation of the city. From the study of the rock segments, it appeared that there was a low percentage of the pores that were formed due to the dissolution process, as well as the effect of weathering was a few centimeters in depth. From the results of the physical tests of the samples, it appeared that the density of the limestone is low to high for the grey gypsum. The grey gypsum has zero porosity, while low in gypsum and medium to high in dolomite and limestone, respectively. The rate of forced water absorption varies, and the reason is the difference in the porosity as it increases with connected pores, which in term leads to an increase in the amount of absorbed water. According to the results of the mechanical tests of the rocks, the compressive strength was low to medium, and the durability of the rocks was high, this confirms the validity of the rocks in the study area as unloading bearing stones. The economic feasibility results from not transporting the old rocks, but rather using them in the same site in the city. These huge quantities of stones, which took a great deal of work and money to bring to the city from the outskirts, cannot be wasted by transporting them outside the city because it will cause significant pollution and cost time and money, whereas they can be used in the reconstruction of the destroyed city, for instance, unloading bearing stones.