Vaastu Shastra is an ancient Indian system of architecture that involves positioning and designing the space within and around buildings according to specific principles of spatial geometry and orientation. It is based on the premise that the five basic elements of earth, water, fire, air, and space influence the people inhabiting the building. The document discusses the principles of each element and how their proper placement and balance according to Vaastu Shastra ensures the health, prosperity and well-being of the inhabitants.