Thachan the name of archaeological pertaining master of Carpenter, Architect, Carver, Sculpture by wood and stone. Their mythology revealed that Thachan is versatile figure to structures, creation and its Science for Carpentry Thachusastram at an antiquity. It seen in Mahabharatham.One of the ancient talented caste Thachan exist that convincing Holy Text Mahabharatam, Bible etc. Population 400000 (Four Lakhs)