The concrete that was used in the construction of the chapel was not any ordinary concrete. The best sand had to be selected from the sand dunes on the coast line and transported up the Chao Phraya River via barges. The concrete itself had to also be the best quality. Once the mix was available, it then had to go through rigorous testing to ensure long lasting quality, and only when the specialist team had given its approval would the construction continue. The gravel that was used to construct the outer wall of the chapel had to be selected by hand. It had to be the whitest and purest and similar in size to a grain of rice. The people who selected these stones were none other but the devotees and supporters of the temple.
Above the door of the chapel the symbol of the three lotus flowers symbolizing the Triple Gem of Buddhism is displayed.
The foundation stone for the main chapel laid by H.R.H. Princess Maha Chakri Sirindhorn on behalf of H.M. the King in December 2520 B.E. (1977) marked by the official foundation of the center as a temple – Wat Phra Dhammakaya.