Villa Adriana - Tivoli, -outside of Rome--- Via di Villa Adrianna exclusive retreat for emperors. Almost years old, took 12 years to build. Art and sculptures are now displayed in the Museo Nazionale Romano.
The influence of Greek architecture lingers within the righteous columns however, the Roman interior design is clearly distinct with it's gold themes (bling!) and monotheism belief present in the central altar of the Pantheon church in Rome, Italy.