Source of Vasthu
Vasthu Shastra being passed on through vedic scripts, Olaichuvadi, books etc.
Sources are being divided into three segments viz.,
1. Early Stages by Vedic Saints
2. Dravidian Priniciples (South Indian based Vasthu System)
3. Indo-Aryan Principles (North Indian based Vasthu System)
The following are the earliest known source for Vasthu Shastra.
1. Agni Purana (one of the eighteen puranas. Chapter 106 details about Vastu mainly for cities and palces)
2. Works by Kautilya
3. Works by Sukracharya (Guru for Asuras).
Only these 3 were only known to us and are the earliest version of Vasthu Shastra but not generally followed today.
Dravidian Vasthu Shastra (Vasthu Shastra of South India)
4.Manasara Shilpa Shastra written by Manasara (mainly dealing with shilpa shastra and 64 types of Arts or kalaigal)
5. Mayamata by Maya or Mayan. (Defined Vasthu and built Cities. Maya is the father of Mandodari (Father in law of Ravana).) Maya built a palace at Indraprastha for Yudishitra (elder brother of Pandavas)
Traditional or Indo-Aryan Vasthu Shastra (north Indian Vasthu)
6 Vasthu Shastra by Viswakarma. (A universal architect and creator of this Universe)
7. Aparajitha Priccha (Dialogues between Viswakarma and Aparajitha (Son of Viswakarma).by Bhuvanadevacharya.
Others:
8 Samarangana Sutradara by Bhoja Raja.