Mayamatam 26.86

26.86

vāsavyāse'rkabhāge tudvibhāgaṃ madhyamāṅgaṇam
parito mārgamekāṃśamantarvāramathāṃśakam

When the width of the dwelling is twelve parts, the central courtyard is two parts; / all around the path is one part, and the inner gallery is then one part;