To begin to offer an answer to this question, longtime art collector Anna Lenz conducted twenty interviews with the life partners and wives of well-known contemporary artists, including, among many others, Elizabeth Goldring-Piene, wife of German multimedia artist Otto Piene; Karin Girke, widow to the late painter Raimund Girke; Rotraut Klein-Moquay, artist and wife of Yves Klein; and art historian and critic Antje von Graevenitz, wife of op-artist and cofounder of the New Tendency movement Gerhard von Graevenitz.