Kusama spent much of her time between 1962 and 1964 sewing thousands of stuffed fabric tubers and grafting them to furniture and found objects to create her Accumulation sculptures. She exhibited the works together in an attempt to create hallucinatory scenes of phallic surfaces but found the labor involved in making them physically and mentally taxing. In response to the labor intensity of this work, she started to utilize mirrors to achieve similar repetition. Infinity Mirror Room— Phalli’ s Field was perhaps the most important breakthrough for Kusama during this immensely fruitful period. The reflective surfaces allowed her vision to transcend the physical limitations of her own productivity. Furthermore, the mirrors created a participatory experience by casting the visitor as the subject of the work, a feature that the artist demonstrated through a provocative series of self-portraits in which she used her body to activate the space. This work first appeared in the exhibition Floor Show, held at Castellane Gallery, in New York, in 1965.