Two things that changed after the fall of Rome

Over time, the east thrived, while the west declined. In fact, after the western part of the Roman Empire fell, the eastern half continued to exist as the Byzantine Empire for hundreds of years. ... The western half of the empire had a large trade deficit with the eastern half.

Explanation:

a lot of things and nothing was really the same'

answer: there were new carvings etched into the back of the sculpture and each shoulder was turned into a symbol of the birdman.