Matsya Purana — Design and Splendour of Tripura: Maya’s Threefold Moving Fortress
कार्ष्णायसमयं यत्तु मयेन विहितं पुरम् तारकाख्यो ऽधिपस्तत्र कृतस्थानाधिपो ऽवसत् //
kārṣṇāyasamayaṃ yattu mayena vihitaṃ puram tārakākhyo 'dhipastatra kṛtasthānādhipo 'vasat //
And that city, wrought of black iron (kārṣṇāyasa) and constructed by Māyā—there a lord named Tāraka dwelt, established as the ruler of that founded seat (the capital).
This verse is not about Pralaya; it describes construction—an iron-built city made by Maya—and identifies its ruler, indicating a Vastuvidya-style narrative focused on built environments and governance.
By stressing an “established seat” and a named “adhipa” (ruler), it reflects the Purāṇic idea that a properly founded capital requires clear sovereignty and administration—core royal duties tied to order, protection, and stable settlement.
Architecturally, it highlights material specification (kārṣṇāyasa—iron construction) and planned founding (kṛtasthāna—an established seat/capital), aligning with Matsya Purana’s Vastuvidya emphasis on deliberate city-making and designated rulership.