At the ashram where I do Kundalini in Orlando they have this beautiful yantra painted on the wall. I have noticed it there for a while and wondered from time to time what it was. It wasn’t until looking online at Flower of Life patterns that I saw this design and came to learn it’s called the Sri Yantra.
The Sri Yantra contains nine interlocking triangles facing either up or down, representing the union of Shiva and Shakti. It is also referred to as the Sri Chakra or Nava Chakra, meaning nine chakras. Although it is traditionally drawn flat, it can also be constructed three dimensionally as a pyramid with nine levels. In this form its called the Maha Meru.
I have just begun my personal exploration of this yantra, but I encourage you to join me or share your experience and understanding.
Zac SacBe 
can you please tell me the reason this yantra is displayed inverted by 180 degrees { if you see other photos 4 triangles are up and 5 down }
i would like to share with you a photo of a 2000 year old shree yantra
link: http://bhoj11.blogspot.in/2012/07/authentic-design-of-sri-yantra.html