Agni Purana — Mantra-shastra, Shloka 16
Worship of Gaurī and Others (Gauryādi-pūjā) — Mantra, Maṇḍala, Mudrā, Homa, and Mṛtyuñjaya Kalaśa-Rite
त्र्यश्रोर्धे चार्धचन्द्रस्तु द्विपदं द्विगुणं क्रमात् द्विगुणं द्वारकण्ठन्तु द्विगुणादुपकण्ठतः
tryaśrordhe cārdhacandrastu dvipadaṃ dviguṇaṃ kramāt dviguṇaṃ dvārakaṇṭhantu dviguṇādupakaṇṭhataḥ
त्र्यश्र भाग के ऊपर अर्धचन्द्र का विधान है। इसके बाद माप दो पद का है; फिर क्रम से प्रत्येक अगला अंग दुगुना किया जाए। द्वार-कण्ठ पूर्व माप से दुगुना, और उपकण्ठ उससे भी दुगुना हो।
Lord Agni (narrating to Sage Vasiṣṭha, as the standard Agni Purāṇa frame)
Vidya Category: {"primary_vidya":"Vastu","secondary_vidya":"Shilpa","practical_application":"Applying proportional rules for architectural members—triangular element, semicircular element, and successive doubling measures including dvāra-kaṇṭha and upakaṇṭha—during doorway/ornamental construction.","sutra_style":true}
Encyclopedic Reference: {"reference_type":"Procedure","entry_title":"Proportions of architectural members: tryaśra, ardhacandra, dvāra-kaṇṭha, upakaṇṭha","lookup_keywords":["tryaśra","ardhacandra","dvāra-kaṇṭha","upakaṇṭha","dviguṇa"],"quick_summary":"Specifies a measurement sequence: after setting a two-pada measure, successive members are doubled; the doorway-neck is twice the prior, and the subsidiary neck is twice that—guiding consistent architectural proportioning."}
Concept: Order (krama) and proportion (māna) generate structural harmony; doubling rules simplify complex design into repeatable ratios.
Application: Use a modular unit (pada) and apply dviguṇa scaling to maintain consistent moulding/door proportions across a build.
Khanda Section: Vastu-shastra / Shilpa (architectural measurement and temple/building proportions)
Primary Rasa: shanta
Secondary Rasa: adbhuta
Visual Art Cues: {"scene_description":"A sthapati marks a doorway elevation: a triangular member topped by a semicircular motif; measurement lines show two-pada base and successive doubling up to dvāra-kaṇṭha and upakaṇṭha.","kerala_mural_prompt":"Kerala mural, artisan-sage with measuring cord and stylus, doorway diagram on a wall panel, tryaśra and ardhacandra motifs clearly shown, earthy tones, decorative architectural borders.","tanjore_prompt":"Tanjore painting, ornate temple doorway with gold-highlighted mouldings, visible semicircular arch motif, inset showing measurement doubling (dviguṇa) with traditional tools, rich reds and greens.","mysore_prompt":"Mysore painting, technical elevation drawing aesthetic, clean measurement ticks labeled ‘pada’, ‘dviguṇa’, ‘dvāra-kaṇṭha’, ‘upakaṇṭha’, craftsman demonstrating with scale and cord.","mughal_miniature_prompt":"Mughal miniature, workshop scene with architects, a detailed doorway elevation on paper, compass and ruler, annotations of doubling ratios, refined architectural detailing in the background."}
Audio Atmosphere: {"recitation_mood":"instructional","suggested_raga":"Shankarabharanam","pace":"medium","voice_tone":"instructional"}
Sandhi Resolution Notes: त्र्यश्रोर्धे = त्र्यश्र + ऊर्धे। चार्धचन्द्रस्तु = च + अर्धचन्द्रः + तु। द्वारकण्ठन्तु = द्वारकण्ठम् + तु। द्विगुणादुपकण्ठतः = द्विगुणात् + उपकण्ठतः।
Related Themes: Agni Purana 325 (vāstu/śilpa measurement segment contiguous with pūjā material)
FAQs
It gives a Vāstu/Śilpa proportional rule: after a triangular element comes a semicircular one, and subsequent architectural members (including doorway ‘neck’ bands like dvāra-kaṇṭha and upakaṇṭha) are sized by a stepwise doubling sequence using the unit ‘pada’.
Beyond theology, the Agni Purāṇa preserves technical canons of architecture—precise proportional design rules for structural/ornamental components—showing its compendium-like coverage of applied sciences such as Vāstu and Śilpa.
In Purāṇic Vāstu, correct proportions are treated as dhārmic alignment of sacred space; building according to canon is said to support auspiciousness, stability, and the merit (puṇya) associated with properly formed ritual and devotional structures.