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 - earth, water, fire, air and space - shape life on earth. Vaastu provides guidelines for building placement and layout to harmonize the flow of these elements and maximize their benefits. Proper Vaastu alignment is believed to promote health, prosperity and well-being for occupants.