The Sanskrit word vāstu means a dwelling or house with a corresponding plot of land. The underlying root is vas “to dwell, live, stay, reside”. The term shastra may loosely be translated as “doctrine, teaching”. Vāstu-Śastras (literally, the science of dwelling) are ancient Sanskrit manuals of architecture. VAASTU-Purusha is the most important being if one has to understand Vastu Shastra as a whole.