Marusankakushikaku
Maru-sankaku-shikaku (Japanese: まるさんかくしかく / 円三角四角; lit. 'circle, triangle, square'), also known as ○△□, or in English as The Universe, is a zenga by Sengai, a Japanese monk and artist, thought to have been made between 1819 and 1828. The work consists of a circle, a triangle and a square drawn in ink on paper, and has been called the "most mysterious work left by Sengai" due to its simplicity and ambiguity.