Virtual tour of ancient Rome is not possible with Google earth. Bernard Frischer of Virginia University is key person on this project with Google.

3D model of Rome with 6,700 buildings and other 250 important place can be useful for students in Teaching history of world’s old civilization and culture. Rome is researched from about 500 years. The model was created by archaeologists and model-makers between 1933 to 1974 and housed in a special gallery in Rome's Museum of Roman Civilization.
In the Ancient Rome 3D layer, you can:
-Fly into 320 A.D. Rome.
-Famous buildings and interiors.
-Visitor’s places such as Roman Forum, Colosseum and the Forum of Julius Caesar.
-Virtual tour to ancient Roman life style.