Sri Yantra

In the Shri Vidya school of Hindu tantra, the Sri Yantra ("sacred [Sri Chakra]"), is a diagram formed by nine interlocking triangles that surround and radiate out from the central (bindu) point.

It represents the goddess in her form of Shri Lalita or Tripura Sundari, "the beauty of the three worlds" (Bhoo, Bhuva and Swa). The worship of the Sri Chakra is central to the Shri Vidya system of Hindu worship. Four isosceles triangles with the apices upwards, representing Shiva or the Masculine. Five isosceles triangles with the apices downward, symbolizing female embodiment Shakti. Thus the Sri Yantra also represents the union of Masculine and Feminine Divine. Because it is composed of nine triangles, it is known as the Navayoni Chakra.

"These nine triangles are of various sizes and intersect with one another. In the middle is the power point (bindu), visualizing the highest, the invisible, elusive centre from which the entire figure and the cosmos expand. The triangles are enclosed by two rows of (8 and 16) petals, representing the lotus of creation and reproductive vital force. The broken lines of the outer frame denote the figure to be a sanctuary with four openings to the regions of the universe".