Vastu shastra (vāstu śāstra) is a traditional Hindu system of architecture which literally translates to "science of architecture."
These are texts found on the Indian subcontinent that describe principles of design, layout, measurements, ground preparation, space arrangement and spatial geometry.
Vastu Shastras incorporate traditional Hindu and in some cases Buddhist beliefs.The designs are intended to integrate architecture with nature, the relative functions of various parts of the structure, and ancient beliefs utilizing geometric patterns (yantra), symmetry and directional alignments.
Vastu Shastra are the textual part of Vastu Vidya, the latter being the broader knowledge about architecture and design theories from ancient India.
Vastu Vidya knowledge is a collection of ideas and concepts, with or without the support of layout diagrams, that are not rigid. Rather, these ideas and concepts are models for the organization of space and form within a building or collection of buildings, based on their functions in relation to each other, their usage and to the overall fabric of the Vastu.
Ancient Vastu Shastra principles include those for the design of Mandir (Hindu temples),and the principles for the design and layout of houses, towns, cities, gardens, roads, water works, shops and other public areas
Vastu Shastra unifies the science, art, astronomy and astrology, it can also be said as an ancient mystic science for designing and building. Vastu Shastra helps us to make our lives better and will secure from things going wrong.
Vaastu is the science of directions that combines all the five elements of nature and balance them with the man and the material. Vaastu Shastra is creating a congenial settings or a place to live or work, in most scientific way taking advantages of the benefits bestowed by the five elements called "Paanchbhootas" of the nature thereby paving the way for enhanced health, wealth, prosperity and happiness in an enlightened environment.
Our sages and seers have knew the secrets of using all the five elements of this universe and their special characteristics and influences such as the magnetic field, gravitational effect etc. of Earth, the galaxy in the sky, the directions and velocity of the winds, light and heat of the SUN including the effects of its Ultra-Violet and Infra-Red rays, the volume and intensity of rainfall etc. for the advantage of the mankind in suitably planning and constructing buildings for dwelling, prayer, entertainment , education , working , production and other purposes . They evolved scientific methods and systems and confined them over the years as 'VAASTU SHASTRA'. Our sages SEARCHED it; we are only RESEARCHING it and building the concepts.
Man is the subject, object and the cause of architecture. He perceives and conceives architecture in relation to his experience of himself with the surrounding world. Through art of design, he alters and moulds the elements of natural environment.
The world comprises of five basic elements, also known as the Paanchbhootas. They are Earth, Water, Air, Fire and Space. Out of the nine planets, our planet has life because of the presence of these five elements. Earth and Water have limited and localized availability for the human habitat and growth. They form apparent and fundamental choice makers in the location and the physical form of architecture and habitat. Sun, Air and Space are universally available and can be moulded to human needs by the act of design. In order to understand the act of design with these five elements, we shall have to take each one separately to appreciate their meaning, role, and workability in architecture.
Vastu can be used for every structure like room,house,temple,shop industry, town planning, tour, cities and even for earth. Vastu can be used for micro as well as for macro level.Every creature on earth starts its life with sunrise as it performs day & night. Hence there is much importance of sun in every one life. It gives ultra violet rays in morning and infra red rays in evening which one basic need to reduce / generate bio-chemical germs, N2/ Oxygen / CO2 on earth.
Sun indicates light (illumination) will power, generosity, solar system, luck or fate, mobility and in body. It rules over bone, eye, heart, spinalcord, blood circulation and soul etc. Hence east direction is auspicious; it belongs to lord Indra. North is considered auspicious since magnetic lines of forced moves from North to South, thus origin of all the life.