In the upstairs gallery of the Memorial Art Gallery in Rochester, NY there is a whole section for Roman art. Here are a few sculptures on the wall and a sarcophagus. The sarcophagus looks more like a tub to me because is has a drain at one end a hole where it looks like water came in. The stone carvings are amazing.
Click images to see a larger view:
This is a statue of Togatus a Roman Claudian to Flavian person (27 BCE -96CE) in marble: