The ancient mystical symbol of wealth - Sri Yantra is a supreme instrument for spiritual advancement of man. The outer square represents the space, the three circles represents past present and future. The nine interlocking triangles represents the obstacles that man has to overcome to attain nirvana. The Bindu represents all universe which has evolved with the grace and will of Adi Shakti.
This is used to worship feminine energy / लक्ष्मीमाता