There have been dozens of major posthumous exhibitions in the United States and Europe. An early one was at the Guggenheim Museum (1972), while in 1979, three separate iterations of an Eva Hesse retrospective were held, entitled "Eva Hesse: Sculpture". These exhibitions took place at the Whitechapel Art Gallery in London from May 4 – June 17, 1979; the Kroller-Muller in Otterlo from June 30 – August 5, 1979; and the Kestner-Gesellschaft in Hannover from August 17 – September 23, 1979. One artwork featured in the exhibition was "Aught," four double sheets of latex stuffed with polyethylene. In 1982, Ellen H. Johnson organized the first retrospective dedicated entirely to Hesse's drawings, which traveled to the Grey Art Gallery at NYU, the Allen Memorial Art Museum at Oberlin College, the Renaissance Society at the University of Chicago, the Contemporary Arts Museum in Houston, and the Baltimore Museum of Art. In 1992 and 1993, retrospective exhibitions were held in New Haven, Valencia and Paris.