Is there a source for historical shapefiles of Europe in the modern era, i.e. starting ca. 1400?
I know that "where can I find historic border data" questions were asked multiple times but I couldn't find an answer to my specific question.
This page gives you border shapefiles of the whole world over the centuries:
The services has been discontinued, see the answer from Joseph below.
If you want more details, you might georeferenece and digitize some old maps from here:
But don't expect too much accuracy ;-)
Direct link to the ThinkQuest downloads mentioned in other answers: http://web.archive.org/web/20080328104539/http://library.thinkquest.org:80/C006628/download.html
Searching for a similar set, I stumbled across this resource:
However there's no projection info or .prj files, so it doesnt seem usable?