The Hindu temple architecture is an open, symmetry driven structure, with many variations, on a square grid of padas, depicting perfect geometric shapes such as circles and squares.
In ancient Indian texts, a temple is a place for Tirtha - pilgrimage. It is a sacred site whose ambience and design attempts to symbolically condense the ideal tenets of Hindu way of life. All the cosmic elements that create and celebrate life in Hindu pantheon, are present in a Hindu temple - from fire to water, from images of nature to deities, from the feminine to the masculine, from kama to artha, from the fleeting sounds and incense smells to Purusha - the eternal nothingness yet universality - is part of a Hindu temple architecture.
The architectural principles of Hindu temples in India are described in Shilpa Shastras and Vastu Sastras. The Hindu culture has encouraged aesthetic independence to its temple builders, and its architects have sometimes exercised considerable flexibility in creative expression by adopting other perfect geometries and mathematical principles in Mandir construction to express the Hindu way of life.
Susan Lewandowski states that the underlying principle in a Hindu temple is built around the belief that all things are one, everything is connected. The pilgrim is welcomed through mathematically structured spaces, a network of art, pillars with carvings and statues that display and celebrate the four important and necessary principles of human life - the pursuit of artha (prosperity, wealth), the pursuit of kama (desire), the pursuit of dharma (virtues, ethical life) and the pursuit of moksha (release, self-knowledge).
At the center of the temple, typically below and sometimes above or next to the deity, is mere hollow space with no decoration, symbolically representing Purusa, the Supreme Principle, the sacred Universal, one without form, which is present everywhere, connects everything, and is the essence of everyone. A Hindu temple is meant to encourage reflection, facilitate purification of one’s mind, and trigger the process of inner realization within the devotee. The specific process is left to the devotee’s school of belief. The primary deity of different Hindu temples varies to reflect this spiritual spectrum.
The appropriate site for a Mandir, suggest ancient Sanskrit texts, is near water and gardens, where lotus and flowers bloom, where swans, ducks and other birds are heard, where animals rest without fear of injury or harm. These harmonious places were recommended in these texts with the explanation that such are the places where gods play, and thus the best site for Hindu temples.