Please allow some of my ideas to help within this huge topical scope:
As you examine the growth and development of Roman art, please note how it emerged from Etruscan art. Thus, the close connection to Greek art is noted. Please also mention how 500 BC and the beginning of the Roman Republic caused art to excel. Portraits were quite popular during this era. You can also look at the evolution of Roman art when their invasions of Greece caused a transformation.
Art also took the form of statues, common and regal jewelry, rings, mosaics, and other examples.
Next, as you summarize architecture, you can attribute the Romans with revolutionizing ...
Roman art, architecture and technology are overviewed.