Bindu - Classic Yantras contain the Bindu given that the central point from the yantra. It is claimed for being the symbolic representation of the initial kind, often called ellipsoid or linga. It is considered the chakra of pure consciousness, and so, the Crown Chakra Yantra (or Sahasrara Chakra Yantra) https://www.youtube.com/@Mahavidyabaglamukhi