Theophylact Simocatta
In subsequent ages, siege engineers continued to use the name "helepolis" for moving towers which carried battering rams, as well as for machines for throwing spears and heavy stones. The Byzantines much later used the term "helepolis" to describe a very different siege engine; the traction trebuchet. The first recorded use of this terminology was by Theophylact Simocatta, in describing the siege of Tiflis in the Byzantine–Sassanid War of 602–628.