Broer Map Library : Online Historic Mapso switch between any of 8 different mapping sites, including Google Maps, Microsoft Virtual Earth, Yahoo!, Ask, OpenLayers, and NASA.
Europeana - a place for inspiration and ideas. Search through the cultural collections of Europe, connect to other user pathways and share your discoveries
The World Digital Library (WDL) makes available on the Internet, free of charge and in multilingual format, significant primary materials from countries and cultures around the world.