[en] It is the aim of the present study to investigate some thermoluminescence properties of pyramid stones. Using a few grammes of pyramid stones from Pyramids I and II, the TL glow peaks were observed at 250 and 310⁰C, respectively. The TL glow peaks of samples annealed at 600⁰C, then exposed to ⁶⁰Co γ-rays were observed at 120, 190 and 310⁰C, respectively. The accumulated dose of natural samples is estimated to be around 310 Gray (31 krad). By assuming an annual dose is 1 mGy, the estimated age of pyramid stones is 0.31 M year. (author)