One of the beautiful arrangements of Circles found at the Temple of Osiris at Abydos, Egypt (Rawles 1997). The Circles are placed with six-fold symmetry, forming a mesmerizing pattern of Circles and Lenses.
See also Five Disks Problem, Reuleaux Triangle, Seed of Life, Venn Diagram
References
Rawles, B. Sacred Geometry Design Sourcebook: Universal Dimensional Patterns. Nevada City, CA: Elysian Pub., p. 15, 1997.
Wein, J. ``The Flower of Life.'' http://www2.cruzio.com/~flower/.
Weisstein, E. W. ``Flower of Life.'' Mathematica notebook FlowerOfLife.m.