Sri Yantra is handpainted in Kathmandu Nepal. It is called 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 corresponds to a chakra of the body).