Felix Dahn

Cethegus, leader of the Roman nobility, travels to Bizantium and its leader Justinian, in an attempt to raise an army to march on the Goths under Narses. Cethegus would like to set the two sides to war against each other, that his own forces might take control at the outcome. (imdb)

The second half, of Der Kampf um rom 2: Der Verrat (which also clocks in at just over 1.5 hours) was issued in 1969, a year after the first; Four years after that (c. 1973), the two parts of Der Kampf um Rom were edited together, cut down to 94 minutes, and distributed as a single entry in the United States. (allmovie.com)