The Cranmer Art Group was founded in New York City, New York in 1988 by Dana Cranmer, an art conservator who was professionally active in New York City from 1970 to 2021. Cranmer spent 11 years with the conservation staff at the Solomon R. Guggenheim Museum in New York, seven years with the Mark Rothko Foundation, and then opened her private practice, the Cranmer Art Group (CAG) in 1988, which operated until 2021. The Cranmer Art Group specialized in contemporary and 20th century artwork, primarily paintings and works on paper.