Matsya Purana — Design and Splendour of Tripura: Maya’s Threefold Moving Fortress
नूपुरारावरम्याणि त्रिपुरे तत्पुराण्यपि स्वर्गातिरिक्तश्रीकाणि तत्र कन्यापुराणि च //
nūpurārāvaramyāṇi tripure tatpurāṇyapi svargātiriktaśrīkāṇi tatra kanyāpurāṇi ca //
In Tripurā, those cities too were delightful with the charm of Nūpurā; they possessed a splendour surpassing even heaven, and there were also cities there known as Kanyāpurā.
This verse is not about Pralaya; it focuses on the splendour and naming of cities in Tripurā, fitting a descriptive Vastu/urban-imagery passage rather than a dissolution narrative.
Indirectly, it supports the Purāṇic ideal that a ruler should establish well-planned, prosperous cities—so orderly and beautiful that they are compared to (or said to surpass) heavenly realms.
The key significance is the Vastu-oriented idealization of urban space: cities are evaluated by beauty (ramyatā), prosperity (śrī), and renowned quarters/settlements (named puras), implying planned civic grandeur aligned with dhārmic kingship.