Bindu - Standard Yantras contain the Bindu because the central position with the yantra. It is said for being the symbolic illustration of the first type, generally known as ellipsoid or linga. It's viewed as the chakra of pure consciousness, and thus, the Crown Chakra Yantra (or Sahasrara Chakra Yantra) https://www.youtube.com/@Mahavidyabaglamukhi