Rabideau's focus is primarily East and West Prussia, but he also has information about other areas of Germany, lots of maps, videos, photos, transliterating Cyrillic, and more. Some of the highlights:
Prussian history
Prussian directories
Photo galleries
Old German newspapers
Maps
- Prussian maps
- Danzig maps
- German-speaking people in Europe prior to World War II
- German expulsion maps
- Central Europe and Baltic region maps
- Early North American maps
- New France and early Canada maps
Genealogy and social networking technologies
This site is worth bookmarking and checking on a regular basis to see what else has been added. Almost everything appears to be free. The only items that currently require a paid membership (life membership for $20) are from 1896, 1902, and 1934. The site says that payment is required due to copyright restrictions, though I don't understand what copyright could apply to something from 1896.
