J. PACT 55 1995, Athens, Greece, 6 - 07 November 1995, vol.1, pp.221-229
In determining the material properties of the historical structures non-destructive metods are favored. This study reports the results of the two well known non-destructive tests, namely Ultrasonic Pulse Velocity Tests and Schimidt Hammer Tests carried out on the mortar and bricks used in Hagia Sophia