j. carter brown about their works, commissioned by the gallery to enhance and celebrate the new building. brown: and then a couple more pieces come out. men: that's right. all right. there we go. narrator: the artists had been chosen because of tir preeminence and their genius for creang monumental works for monumental spaces. moore: that's lovely to have a picasso here. brown: you do give the opportunity to relate in scale to trees and other things and not just the building. moore: all my argument was not to have pieces that are attached to the building. you know, it becomes like reliefs, it's a decoration to the architecture. brown: yes, yes, yes. i think you should have a sculpture that's separate from the architecture to give scale to the architecture and to the sculpre brown: yes. narrator: it would prove to be calder's last work of epic proportions, and he would approve its fabrication one week before his death. ( machine whirring ) the ultimate space for calder's work was the third major element in the building's design. the space-frame and main skylight would be nstructed 80 feet