Agnes Martin (1912–2004) American artist
as quoted by Lucy R. Lippard, in 'Hommage to the Square', Art in America, July-August 1967, p. 55
This quote is one of the most frequently quoted statements of Agnes Martin. A later variation by her: 'The rectangle is pleasant, whereas the square is not'; Agnes Martin is than 89 - quoted in A House Divided: American Art Since 1955, Anne M. G. Wagner Univ. of California Press 2012, p. 263
1960's