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Search 3,721 documents across 34 fields — every claim tier-rated by evidence

3,721 Documents 34 Sections 43,625 Citations 34,852 Keywords Indexed 4 Evidence Tiers

3,633 are the core, quality-scored corpus (34 lettered sections — see How We Work); the remaining 88 are cross-corpus synthesis documents (68 InterDocs, 12 Connections, 8 Theories) also indexed here.

4 results for "tetractys"

C_3_12 Verified Global Traditions

C_3_12 — Numerology — Sacred Number Systems Across Cultures

The conviction that numbers possess intrinsic sacred, cosmological, or metaphysical significance — and that the structure of reality is fundamentally mathematical — appears in virtually every literate civilization and ma

numerology Pythagorean tetractys musica universalis gematria Kabbalah

D_5_04 Verified Sites & Artifacts

D_5_04 — Pythagorean Harmony, Sacred Sound, and the Music of the Spheres

The Pythagorean discovery that musical harmony is governed by simple mathematical ratios (octave = 2:1, fifth = 3:2, fourth = 4:3) is one of the most consequential insights in intellectual history — the first demonstrati

Pythagoras Pythagorean Music of the Spheres harmony of the spheres musica universalis harmonic ratios

N_1_03 Verified Secret Societies

N_1_03 — Pythagorean Brotherhood as Proto-Secret Society

Pythagoras of Samos (~570-495 BCE) was a Greek philosopher, mathematician, and mystic who founded a communal religious-philosophical society in the Greek colony of Croton (modern Calabria, southern Italy) around 530 BCE.

Pythagoras Pythagorean brotherhood Croton Music of the Spheres tetractys akousmatikoi

N_1_14 Verified Secret Societies

N_1_14 — Pythagorean Brotherhood: Mathematics, Mysticism & Secret Knowledge

The Pythagorean Brotherhood (c. 530–400 BCE), founded by Pythagoras of Samos in Croton (southern Italy), was simultaneously a philosophical school, a religious community, and a political movement. The Pythagoreans are cr

Pythagoras Pythagorean Croton Magna Graecia number mysticism harmonic ratios

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