Kautilya's Arthashastra 2.5.5

2.5.5

pakveṣṭakāstambhaṃ catuḥśālam ekadvāram anekasthānatalaṃ vivṛtastambhāpasāram ubhayataḥ paṇyagṛhaṃ koṣṭhāgāraṃ ca -
dīrghabahuśālaṃ kakṣyāvṛtakuḍyam antaḥ kupyagṛham, tad eva bhūmigṛhayuktam āyudhāgāraṃ -
pṛthagdharmasthīyaṃ mahāmātrīyaṃ vibhaktastrīpuruṣasthānam apasārataḥ suguptakakṣyaṃ bandhanāgāraṃ kārayet //

The trading-house shall be a quadrangle enclosed by four buildings with one door, with pillars built of burnt bricks, with many compartments, and with a row of pillars on both sides kept apart.

The store-house shall consist of many spacious rooms and enclose within itself the store-house of forest produce separated from it by means of wall and connected with both the underground chamber and the armoury.

The court (dharmasthíya) and the office of the ministers (mahámátríya) shall be built in a separate locality.

Provided with separate accommodation for men and women kept apart and with many compartments well guarded, a jail shall also be constructed.