Syncretism between Jewish/Early Christian art and architecture and that of the Romans is very evident in the Royal Complex of Herodium. The was built the same way the Romans did it, the whole complex is very similar to Roman architecture. Columns are evident throughout buildings of this period and although are not strictly Roman they were not discarded as cultural advances occurred.
This blending of the past and the present seems to take place in everything not just art. Suppose we would have just threw away the wheel and started new instead of trying to improve it. Today’s wheel takes on a very similar shape to the original, it is however, much more advanced today than where it came from. Syncretisim is an example of a normal evolution in art.