Sri Yantra for Integral Yoga Institute, NYC

Sri Yantra is a name for the geometric pattern representing the universal Goddess. The "divine feminine," the Great Mother Archetype, "the beauty of the three worlds - waking, dreaming and deep sleep...", the goddess in her form of Shri Lalita or Tripura Sundari, "the beauty of the three worlds", and many other ways of describing the great mystery of the field of beingness that we flow in....
Sri yantra, also known as Sri Chakra, is called the mother of all yantras because all other yantras derive from it. In its three dimensional forms Sri Yantra is said to represent Mount Meru, the cosmic mountain at the center of the universe.
The Sri Yantra is conceived as a place of spiritual pilgrimage. It is a representation of the cosmos at the macrocosmic level and of the human body at the microcosmic level (each of the circuits correspond to a chakra of the body).
Sri Yantra is first referred to in an Indonesian inscription dating to the seventh century C.E. It may have existed in India, its country of origin, long before the time of its introduction to Indonesia.
The Sri Yantra is a configuration of nine interlocking triangles, surrounded by two circles of lotus petals with the whole encased within a gated frame, called the "earth citadel". The nine interlocking triangles centered around the bindu (the central point of the yantra) are drawn by the superimposition of five downward pointing triangles, representing Shakti ; the female principle and four upright triangles, representing Shiva ; the male principle. The nine interlocking triangles form forty three small triangles each housing a presiding deity associated with particular aspects of existence.
Man's spiritual journey from the stage of material existence to ultimate enlightenment is mapped on the Sri Yantra. The spiritual journey is taken as a pilgrimage in which every step is an ascent to the center, a movement beyond one's limited existence, and every level is nearer to the goal. Such a journey is mapped in stages, and each of these stages corresponds with one of the circuits of which the Sri Yantra is composed from the outer plane to the bindu in the center.
The Sri Yantra is a tool to give a vision of the totality of existence, so that the adept may internalize its symbols for the ultimate realization of his unity with the cosmos.
The goal of contemplating the Sri Yantra is that the adept can rediscover his primordial sources. The circuits symbolically indicate the successive phases in the process of becoming.

Excerpt from:
https://en.wikipedia.org/wiki/Sri_Yantra
http://www.tantra-kundalini.com/sri-yantra.htm
http://www.wakeupanddream.me/2007/12/sri-yantra-another-way-of-saying-its.html