To view the 3D layer in Google Earth, select the layer by clicking on "Ancient Rome 3D" which is located within the "Gallery". Using the Google Earth controls, you can swoop down from the satellite view to explore the ancient city from street to street and column to column. It's the closest we'll get to StreetView imagery from 320 AD!
Check out our video tour:
For tech-minded educators out there, we've also launched our first curriculum contest geared around a new layer in Google Earth. At earth.google.com/romecontest, K-12 teachers in the US can submit lesson plans that incorporate the new Ancient Rome in 3D layer for the chance to win fame, glory, and an awesome prize package. We're accepting submissions in any format from every subject area--from math to art history to philosophy--the only limit is your imagination!
Posted by Anna Bishop, Google Earth Education Team