Yantra: sacred geometry.
The fundamentals of astrological science
Meditation tool. Ancient.
The first time I drew Sri Yantra, I experienced my mind focusing acutely, as if coming to a fine point.
When completed, they are as objects, talisman. They talk back to me. They anchor the space in the room and bring me back.
Yantra defined:
A yantra is a symmetrical, two-dimensional diagram or tool that represents sacred geometric arrangements in three dimensions. The word "yantra" comes from the words "yan" and "tra," which mean "to control, curb, or influence" and "a tool," respectively. Yantras are considered a fundamental part of astrological science and are often worshiped as deities.