The Sri Yantra Puja
The Sri Yantra is an ancient scared geometry model (or yantra) that is used in the Sri Vidya school of Hindu tantra. Graphically it is a 2-dimensional representation of the Sacred Mount Meru, the centre of the Universe in Hindu, Buddhist and Jain cosmology. Within the model are 9 interlocking triangles, the 'fire temple', representing the Cosmos and human body. 4 upward triangles are the masculine Shiva and the 5 downward are the female Shakti. These triangles in turn makes 43 smaller triangles, arranged in 5 levels (which is best seen in the 3D version of the Sri Yantra). These surround the central bindu, point of origin and non-duality. 2 concentric circles made up of 8 and 16 lotus petals respectively symbolise creation and reproductive force.
In essence, you enter the constructs of the physical world and our bodies, bound within it, to ultimately experience the union of Shiva and Shakti in the Point of unity at the centre, the highest peak of the mountain.
Puja is 'the act of worship'. For Sri Yantra puja a 3-dimensional model is used, which is also used as the template for many Indian temples. During puja various items are poured over to bathe the Sri Yantra - milk, curd, honey, gangajal and ghee. Red cloth, red sandalwood, red thread, red rice are offered. Towards the end numerous flower petals shower the model.
It is believed that Goddess Lakshmi resides in the Yantra and She is invoked with full Vedic rituals, ideally on an auspicious day, during Yantra Prana Pratishtha (ceremony to consecrate the Sri Yantra and energise it with cosmic powers).
This is a simplified description of a multi-step, sacred ceremony that is many centuries old, with layers of rich symbolism. Doing a full worship is extremely difficult to do properly and few can do it!
Experiencing the Sri Yantra Puja
You can experience the mantras of the Sri Yantra Puja by Acharya Umesh Tiwariji in the youtube video below. The complete, live experience is naturally more 'powerful' and Acharya Umesh Tiwariji will be returning to the UK, as well as travelling to other countries. I highly recommend the experience and will certainly be repeating it myself.