Vastu Purusha

Introduction and History
Once, when Lord Shiva was fighting the demon called Andhaka, his (the Lord's) perspiration dropped on ground. Out of this was born the Vastu Purusha. Being hungry he started devouring everything that came his way.

The gods then went to Lord Brahma. He told 45 deities to press his face down in northeast and feet in southwest. Lord Brahma blessed him saying that he will be the deity of all plots and offerings have to be done to him while constructing any building. And in return Vastu Purusha is said to take care of the inmates of the house.