Roman life was religion. The Romans were polytheistic meaning that they believed in multiple gods rather than one. Roman society adopted quite a few Greek gods and made them their own such as
Minerva (Athena) or Juno (Hera). This isn’t where the similarities between the two cultures ends though. A lot of Roman architecture is entirely influenced by Greek architecture. A great example of this is the Parthenon and the Colosseum as you can see the resemblance in the