Google introduced a new approach Ancient Rome 3D layer in Google Earth to learning about ancient history: the ability to everyone in the world, go back in time and explore Rome and discover Ancient Rome as it was 1,688 years ago when it was ruled by Emperor Constantine in 320 AD -- in 3D! 

To activate the layer, simply open the "Gallery" folder in the "Layers" panel and select "Ancient Rome 3D."

The new layer, produced by the University of Virginia's Institute for Advanced Technology in the Humanities (IATH) and based on its Rome Reborn model, contains over 6,700 3D buildings and 250 Google Earth placemarks that allow Google Earth users to explore and learn about this fascinating period of history.