Matsya Purana — Tripura Takes Refuge in the Ocean; Maya’s Hidden Nectar-Reservoir and the God...
सागरे जलगम्भीर उत्पपात पुरं वरम् अवतस्थुः पुराण्येव गोपुराभरणानि च //
sāgare jalagambhīra utpapāta puraṃ varam avatasthuḥ purāṇyeva gopurābharaṇāni ca //
In the sea, deep with waters, a splendid city suddenly rose up; and there appeared, as though from ancient times, its gateway-towers and other adornments as well.
It uses an oceanic setting and sudden emergence imagery—suggesting re-manifestation after concealment—rather than describing destruction directly.
By foregrounding a well-adorned, established city with prominent gateways, it aligns with royal duties of founding, protecting, and beautifying urban spaces as part of righteous governance.
The explicit mention of gopura-ābharaṇa (gateway-tower adornments) highlights the importance of gateways and their ornamentation in Puranic-Vastu conceptions of sacred/royal city design.