No late Western emperor busts

Short video on the lack of late-Emperor busts:

The history of Classical Civilization can be divided into two broad periods: the period in which it was rising and the period in which it was failing. From 800 BC to the time of Augustus, the civilization of the cities of the ancient Mediterranean was in the process of increasing sophistication of technology, economic development, demographic development, etc. From the time of Augustus to the 2nd century, it was apparently in a situation of relative peak and stagnation; then, from the mid-2nd century onwards, it started to collapse.

This collapse occurred over all dimensions of society, and it even affected the production of artworks like busts.

In Pompeii submerged by a volcanic eruption in 79 AD, during the economic peak of the ancient world, there are busts of common citizens of the town which were not even very rich but had their own busts, such as this banker: