वास्तुकप्रशस्ते देशे सप्राकारपरिखाद्वारमनेककक्ष्यापरिगतमन्तःपुरं कारयेत् ॥ कZ_०१.२०.०१ ॥
vāstukapraśaste deśe saprākāraparikhādvāram anekakakṣyāparigatam antaḥpuraṃ kārayet
In a site approved by architectural science, he should have the inner palace built with a rampart, moat, and gates, enclosed by multiple successive zones (courtyards/compartments).
Layered access control: multiple controlled zones reduce the probability of intrusion and enable screening, delay, and response at each boundary.
To reduce structural, environmental, and safety risks (fire, water, stability) and to standardize state construction under expert norms.