This document discusses the principles of Vastu Shastra (ancient Indian science of architecture) and its application in building planning and design. It provides background on the history and origins of Vastu Shastra in ancient Hindu scriptures like the Vedas and Puranas. The core concepts of Vastu Shastra are explained, including the five basic elements (panchmahabhoot) that all objects are composed of - earth, water, fire, air and space. Details are given on the properties and significance of each element, especially earth, in selecting land and building materials according to Vastu Shastra.