Yant Trinisinghe (The Twelve-Number Numerical Square & Five Sacred Powders)
One of the Five Sacred Chalk Powders (Phong Wisaet Ha Prakan) written and erased on slate boards by Somdej Toh of Wat Rakhang; structured as interlocking diamonds and a 12-cell numeric sequence.
Constructed from two overlapping squares rotated at 45 degrees (forming an eight-pointed star or diamond grid) subdivided into 12 chambers containing Thai/Khom numerals (3, 7, 5, 4, 6, 5, 1, 9, 5, 2, 8, 5). Each numeral symbolizes a triad or pentad of Buddhist doctrinal categories (such as the 3 Jewels, 7 Awakening Factors, 5 Aggregates, 4 Noble Truths, 6 Senses, 9 Supramundane States, 8 Fold Path).
In the traditional Phong Wisaet treatise (คัมภีร์ตรีนิสิงเห), a monastic scribe writes the Trinisinghe diagram in white chalk on a slate board while chanting the numerical verses, then sweeps the erased chalk dust into the clay/lime mixture used to press Phra Somdej and Phra Pidta tablets.
Syllable-by-Syllable Doctrinal Breakdown (3)
First numerical triad encoding the Triple Gem (3), Seven Factors of Awakening (7), and Five Buddhas of the Bhaddakappa (5).
Second triad encoding the Four Noble Truths (4), Six Sense Bases (6), and Five Aggregates (5).
Third and fourth triads completing the 12-chamber cosmological sequence.
Read the full long-form historical and archaeological monograph with 15–22 independent citations.