See John H. Iliffe, “Imperial Art in Transjordan,” The Quarterly of the Department of Antiquities in Palestine 11 (1945), pp. 1–26 and plates I–X (p. 18 and plate VI). Iliffe saw this bronze altar as a model for a similar ceramic altar with eight horns (one damaged and one missing) that was found in an early–second-century C.E. potter’s workshop in Jerash, excavated from 1933 to 1934.