The reason of using the original stone for stone repair and conservation of ancient Egyptian buildings with review of some reference examples of case study on which the researcher applied, it is the study which the first theme dealt with, consequently the second theme dealt the researcher's discovery of 12 ancient limestone quarries locate in surroundings of Abydos to both the south west (in El-Ghabat village) and the north west of Abydos, to be affixed to documented two ancient limestone quarries in the same district and to be affixed to documented Eighty six ancient limestone quarries in the calcareous plateaus all over Egypt and to preserve them for own archaeological & technological values and for using their context as source of the original stone for repair and conservation, the second theme also enumerates the general and special evidences of using these quarries as a sourcing stone for ancient Egyptian buildings in Abydos, then it is requisite explain in the third theme the reason and criteria of using the stone alternatives whether the correspondent or the appropriate stone artificial stone or the plastic repair for stone repair and conservation of ancient Egyptian buildings with review of some reference examples of case study on which the researcher applied