According to Vastu Shastra the temple is designed based on the principles of Vastu Purush Mandala. The Vastru Shastra also called as the science of structure says that there are forces, some positive and some negative, around us all the time and man can arrange his life to take
advantage of the positive forces. In Sanskrit the word “Vaastu” means a building or structure and so the expression “Vaastu Shastra” is the science of structure. A sacred structure such as a temple is designed to be not just the home of God, but the actual body of God (Svardia,2008).
Hindu architecture always begins by laying the cosmic body of God (purusha) over every building site (mandala). This is called the Mandala Purusha. The basic plan of a Hindu temple is an expression of sacred geometry where the temple is visualized as a grand mandala consisting of the intersection of a circle and a square (Stella,1979).

“A sacred structure such as a temple is designed to be not just the home of God, but the actual body of God”

The picture illustrates this and shows how this cosmic body is positioned in relation to the site. The head of “God” lays in the northeast corner. The basis behind this orientation is the principle of maximization of light. The cosmic head, which is a symbol for enlightenment, is placed in the northeast. There is maximization of light at this point and so the north-east corner is called God’s corner (isha-kona). The cosmic anus is located in the south west corner. This is the position reserved for the negative forces of the universe, and hence no sacred activity must be done at this point (Kak,2000).