The south lawn of the Frist Center for the Visual Arts is now the site of a significant work of outdoor sculpture, which will be on view for a period of three years. The work, Two Lines Oblique Gyratory II (1999), is a stainless steel structure created by George Rickey (1907–2002), a pioneer in the development of kinetic sculpture. As early as the 1950s, Rickey began experimenting with motion, using compound pendulums mounted on sets of bearings that enabled sculptural elements to follow a conical path. Through the 1960s and beyond, Rickey refined his artistic sensibilities and knowledge of engineering to produce complex geometric constructions that involve delicate systems of weights and balances, which allow elements to move in response to natural forces such as gravity and wind.