Vastu Homam also Vastu Veda, ( “science of construction”, “architecture”) is a traditional Hindu system of design based on directional alignments. It is primarily applied in Hindu architecture, especially for Hindu temples, although it covers other applications, including poetry, dance, sculpture, etc. The foundation of Vastu is traditionally ascribed to the mythical sage Mamuni Mayan.

The Vastu Purusha Mandala is an indispensable part of vastu shastra and constitutes the mathematical and diagrammatic basis for generating design. It is the metaphysical plan of a building that incorporates the course of the heavenly bodies and supernatural forces. Purusha refers to energy, power, soul or cosmic man. Mandala is the generic name for any plan or chart which symbolically represents the cosmos.