16 historic maps on Featured Content layer of Google Earth

"This morning was incredibly exciting for me: when I opened up Google Earth, there were 16 of my historic map treasures floating serenely on the Google Earth globe. After months of hard work, the Google Earth team uploaded all the maps this weekend to the Featured Content layer of Google Earth. I was able to explore and fly around the old maps and use the transparency slider to compare the old world and the new; as I did this, I thought to myself that this is the perfect marriage of historic cartographic masterpieces with the innovative contemporary software tools of Google."