Jupiter and Semele by Gustave Moreau, 1895 (click to enlarge)
The Religion of Numa
And Other Essays on the Religion of Ancient Rome
by Jesse Benedict Carter
This is a short survey of the history of Roman religion, particularly the Roman pantheon, from its origins as abstract animistic deities, the infiltration of Greek gods and goddesses, the influence of the Sibyllines, the introduction of Near Eastern Goddess worship and other deities, and finally the rise of the God-Emperors, codified under Augustus.