Siah Armajani (Iranian-American, 1939-2020). Lithograph on paper titled “Sound Towers” from Armajani’s “Tower Projects,” 1969-70. Numbered 31/50, signed, and dated ’72 in pencil along the lower left. Provenance: Distinguished corporate collection, Minnesota. Image; height: 29 1/4 in x width: 43 1/2 in. Framed; height: 37 5/8 in x width: 49 1/4 in x depth: 2 1/4 in.