Highlights of the collection: 13 stainless steel, bronze and steel works by the seminal artist David Smith including Three Ovals Soar, Personage of May, Becca, and XI Books III Apples were acquired in 1967. George Ricky's Six Lines in a T, Two Planes Vertical-Horizontal II, and Five Squares Gyratory Gyratory were added in 1967,1971, and 1992, respectively. Barbara Hepworth's Form of Movement (Pavan) was purchased in 1968 and Square Forms with Circles in 1969. Henry Moore's Reclining Connected Forms was acquired in 1971. Robert Grosvenor's Untitled was added in 1974. Free Ride Home by Kenneth Snelson, purchased in 1975, features a canopy of aluminum tubes. Momo Taro, a 40-ton granite sculpture by Isamu Noguchi, considered to be one of the artist's finest outdoor works, was commissioned in 1977 and has been installed on a specially landscaped hill. Louise Bourgeois' Number Seventy-two (The No March) was added in1978. Alexander Liberman's Iliad was acquired in 1981. Two monumental steel I-beam sculptures by Mark di Suvero, Mother of Peace and Mon Pere, Mon Pere were purchased in 1981 and featured in Storm King Art Center's retrospective of the artist's work in 1985. In 1998, his towering work Pyramidian was purchased and installed in the center of the south fields. Menashe Kadishman's Eight Positive Trees and Suspended were both added in 1985. One of Alexander Calder's last monumental stabiles The Arch was purchased for the collection in 1982. City on the High Mountain, a major sculpture by Louise Nevelson was acquired in 1984. In 1987, Alice Aycock donated her Three-Fold Manifestation II. Magdalena Abakanowicz's Sarcophagi in Glass House, 1989, is composed of four steel-framed glass houses sheltering wood sarcophagi and was donated by the artist in 1994. In 1991, Richard Serra was commissioned to create a site-specific sculpture, Schunnemunk Fork, which consists of four steel plates installed in a ten-acre area. Siah Armajani's Gazebo for Two Anarchists: Gabriella Antolini and Alberto Antonini, 1992, consists of two gazebos connected by a 10 1/2 by 32 1/2 foot bridge. In 1994 Ursula von Rydingsvard's For Paul, created from chiseled strips of cedar wood, was added to the collection. In 1998 Andy Goldsworthy's 2,278 foot long stone Storm King Wall was another major additon.