History of India
Harappan seals India is home to one of the richest and the most ancient civilizations in the world, which existed over 5,000 years ago. This civilization originated in the Indus River Valley, hence the name given to it was Indus Valley civilization.  It was the origin of many of the ideas, philosophies and movements which have shaped the destiny of mankind. Its people are thought to be Dravidians, whose descendants still inhabit the far south of India.
They are engraved on stone tablets, metal plates, pillars, walls of caves, etc. The inscriptions represent various languages at different places and period of time.
A chronological order of the events in Indian history
  History of States