Mandaladraftschool: pan-indian· Bṛhat Saṁhitā

81-pada plot scheme (Brihat Samhita)

ekāśītipada-vāstu

also: paramasayika (TRADITIONAL series-name, identification to confirm — see Q15)

man-vastu-81

Definition

The plot diagram of BS 53.42–54: ten lines east–west and ten north–south yield 81 squares (padas), occupied by 45 deities — 13 inner, 32 in the outer compartments — and constituting the prone body of the Vastu Purusha, head at NE.
Classical

Prāṇa relevance

This grid is the formal interface between place and body: pada → deity → limb of Vastu Purusha → owner's limb (53.51–54 with 53.58–59). All Phase 3 location–health reasoning routes through it.

Cross-book attributes (3) — fill / concur / diverge

Brahma Sthana Fraction SvobodaFilledper txt-svoboda-vastu
for the 9×9 grid the Brahma Sthāna = the innermost 3×3 = 9 squares (11.1% of the grid); these 9 + the outer Paiśāca belt of 32 cells (39.5%) = 41 cells ≈ 50% must stay vacant — 'no construction... may cover more than half of a 9×9 Paramasāyikā Maṇḍala'
Jyotisha ResonanceFilledper txt-svoboda-vastu
the 9×9 'facilitates alignment of the Maṇḍala with the Nine Planets of Jyotiṣa' — Svoboda's stated reason the Paramasāyikā is preferred for residences
Series Name SvobodaFilledper txt-svoboda-vastu
⚑ Svoboda NAMES the 9×9 (81-cell) residential grid PARAMASĀYIKĀ ('the 9 × 9 is called Paramasāyikā'), and says it is 'usually preferred' for residences — partly because it 'facilitates alignment of the Maṇḍala with the Nine Planets of Jyotiṣa' and resonates with the nine digits of the numbering system (cf. Sudoku). This is the series-name BS 53 left descriptive (BS's man-vastu-81 alias 'paramasayika' was TRADITIONAL/unconfirmed, Q15).

Connections (8)

avoided-in · 1
  • ←SleepingClassical
    The vamshas are the marma-bearing lines (53.63–64); the sleeper's body laid along them parallels the salya lodged on them — parallel is ours [SPECULATIVE]; the proscription itself is the classical core.
corresponds-to · 1
  • ↔Paramasāyikā (9×9, 81-pada grid)Traditional
    Svoboda names the 9×9 (81-cell) residential grid 'Paramasāyikā' (reported from the Mayamata's pada-vinyāsa); the Bṛhat Saṁhitā presents the same 9×9 81-pada plot scheme (man-vastu-81) WITHOUT naming it. Per schema §6 the identification of BS's descriptive 81-grid with the named-series Paramasāyikā is itself a CLAIM, expressed as a corresponds-to edge — NEVER a merge. This realises the reserved-name convention Q15 anticipated.
embodies · 1
  • →Vastu PurushaClassical
    Origin myth (gods pin the Being; each presides over the limb he held) realized as the deity-bearing grid.
governs · 4
maps-to · 1

Sources

  • txt-brihat-samhita53.42–50Classical✓ verifiedConstruction, deity roster, pada allotment
  • txt-brihat-samhita53.69Classical✓ verifiedSame scheme applies to towns and villages
  • txt-bs-bhat-1981Diagram 1, p. 468Modern✓ verifiedCell-by-cell layout (verified visually against page image)
  • txt-utpala-vivrtion 53.55–56 (via Bhat)Classical✓ verifiedThe 81-square preparation is obligatory for dwellings of kings and the four varnas (citing Vishvakarman)

Notes from other books

  • txt-svoboda-vastuSvoboda's grid account OVERLAPS Book-1's BS man-vastu-81 (the BS 53.42–50 81-pada plot scheme). He names it Paramasāyikā where BS left it descriptive — exactly the §6 reserved-name situation. Per the project rule I mint man-paramasayika and bind it to man-vastu-81 by a corresponds-to edge, NOT a merge. He also gives the Brahma Sthāna as the innermost 3×3 for the 9×9 (concurs with BS treating the central 3×3 / Brahma×9 padas as the centre — flagged corroboration, not merged). Q raised.

Other attributes

Grid
9x9 (81 padas)
Construction
10 lines E–W + 10 lines N–S (53.42)
Deity Count
45 (13 inner + 32 outer)
Pada Allotment
{"corner_singles":"20 deities × 1 pada (five clustered at each corner)","side_doubles":"20 deities × 2 padas (outer cell + the ring-2 cell directly behind it)","inner_triples":"4 deities × 3 padas (Aryaman E, Vivasvan S, Mitra W, Prithvidhara N of center)","center":"Brahma × 9 padas (central 3×3)"}
Deity Layout
{"outer_ring_east_NE_to_SE":["dev-shikhin (corner)","dev-parjanya","dev-jayanta","dev-indra","dev-surya (middle)","dev-satya","dev-bhrisha","dev-antariksha","dev-anila (corner)"],"outer_ring_south_SE_to_SW":["dev-pushan","dev-vitatha","dev-brihatkshata","dev-yama (middle)","dev-gandharva","dev-bhringaraja","dev-mriga","dev-pitr (corner)"],"outer_ring_west_SW_to_NW":["dev-dauvarika","dev-sugriva","dev-kusumadanta","dev-varuna (middle)","dev-asura","dev-shosha","dev-papayakshma","dev-roga (corner)"],"outer_ring_north_NW_to_NE":["dev-ahi","dev-mukhya","dev-bhallata","dev-soma (middle)","dev-bhujaga","dev-aditi","dev-diti"],"ring_2":"each side-double's second pada sits directly behind its outer pada; ring-2 corners are single-pada deities: dev-apah (NE), dev-savitra (SE), dev-jaya (SW), dev-rudra (NW)","ring_3":"dev-apavatsa (NE corner), dev-aryaman ×3 (E), dev-savitr (SE corner), dev-vivasvan ×3 (S), dev-indrajaya (SW corner), dev-mitra ×3 (W), dev-rajayakshma (NW corner), dev-prithvidhara ×3 (N)","center_3x3":"dev-brahma (9 padas)"}
Lines And Marmas
{"vamsha":"the two main diagonals; breadth in digits = pada side in hasta (53.63–64)","rajju":"four minor diagonals: Shosha–Vitatha, Mukhya–Bhrisha, Jayanta–Bhringaraja, Aditi–Sugriva (53.63)","sira":"the 20 grid lines (10 E–W + 10 N–S); breadth = 1.5 × vamsha (53.64)","marma":"see pra-vastu-marma"}
Scope Of Use
houses; explicitly extended to towns and villages with the same deity placement (53.69)
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