Three Piece Sculpture: Vertebrae (LH 580a), also known as Dallas Piece or Vertebrae, is an abstract bronze sculpture by Henry Moore. It was cast in 1978-79, specifically for a site outside I.M. Pei's Dallas City Hall, and is the largest version of a sculpture that Moore created in 1968. Moore was commissioned in 1978 to create a sculpture to stand in the City Centre Park Plaza outside the Dallas City Hall, for which he scaled up his 1968-69 work Three Piece Sculpture: Vertebrae. * Working model, Washington, D.C. * Full-size sculpture, Perry Green * Dallas Piece