The career of Agnes Martin (1912 – 2004) spanned nearly five decades. During this time, she became one of America’s foremost abstract painters. Her style was underpinned by her deep belief in the emotive and expressive power of art. She sought to represent how nature made her feel and could make us feel – humble, joyous, free. For Agnes, the horizontal line was her joy; the expanse of the horizon and open plain or the serenity of the sea.