1960, excavated by Robert H. Dyson Jr. on behalf of the Hasanlu Project sponsored by the University Museum of the University of Pennsylvania, the Archaeological Service of Iran, and The Metropolitan Museum of Art; acquired by the Museum in 1961, as a result of its financial contribution to the excavations.
Muscarella, Oscar W. 1988. Bronze and Iron: Ancient Near Eastern Artifacts in The Metropolitan Museum of Art. New York: The Metropolitan Museum of Art, p. 43 , no. 47.
Muscarella, Oscar W. 2004. "The Hasanlu Lion Pins Again." In A View From The Highlands: Archaeological Studies in Honour of Charles Burney, edited by Antonio Sagona. Leuven: Peeters, p. 707, fig. 1.2.
de Schauensee, Maude. 2011. Peoples and Crafts in Period IVB at Hasanlu, Iran. Hasanlu Special Studies IV, edited by Robert H. Dyson. University Museum Monograph 132. Philadelphia: University of Pennsylvania Museum of Archaeology and Anthropology, pl. 5.10.