The Sri Yantra, Shri Yantra, or Shri Chakra is a form of mystical diagram (yantra) used in the Shri Vidya school of Hinduism. Traditions associate the first known drawings of the complex yantra with the figure of Adiśaṃkarācārya mention that the earliest examples of yantras date back to 11,000–10,000 BCE. Comprising nine interlocking triangles, it embodies complex symbolism. Four upward triangles signify Shiva, while five downward triangles represent Shakti, encompassing the cosmic and human realms around a central point called the bindu. This configuration is sometimes termed the "Navayoni Chakra".