In this paper, the chronology of building techniques in Pompeii is examined on the following points. 1) Re-using of building stones and techniques. 2) Building techniques provide a terminus ante quem for the date of the construction. 3) Post work carries the weight of upper structures. In the first century B. C. rubble work containing re-used stone ashlars were simultaneously with brick and block works. This work formed the post, which lend assistance to walls in sustaining the weight. Conclusively this work does not directly mean the construction before the building containing brick and block works.