Vastu shastra means a science of architecture and construction of living place. Vastu shastra is provides a detailed manuals on site selection, site purification, design, layout, measurements, ground preparation, space arrangement and other aspects of architecture. The designs are based on integrating architecture with natural forces and ancient Indian beliefs utilizing perfect geometric patterns i.e. yantra and directional alignments.
Ancient Vastu Shastra guides on design of the religious places, design and layout of houses, towns, cities, gardens, roads, irrigations, works, shops and other public locations. While most Vastu shastras describe rules of construction and architecture, a few vastu experts include astrology gems and metal during the constructions. Famous historians such as Alexander Cunningham and James Fergusson have suggested that the idea of vastu Shastra developed between 6000 BCE and 3000 BCE. The famous archaeological sites Harappa and Mohenjo-daro are based on the principles of Vastu Shashtra. Excavation of number of ancient sites proves existence of Vastu shastra.