In Zen Buddhism, an ensō (円相) is a circle that is hand-drawn in one or two uninhibited brushstrokes to express a moment when the mind is free to let the body create. The ensō symbolizes absolute enlightenment, strength, elegance, the universe, and mu (the void). The ensō in this design is based on the character for heart/mind and was made by Daido Bunka in the first half of the eighteenth century.