The Arithmeum

The next time you are in Germany, make sure to get yourself down to Bonn to check out the Calculator Museum.  Or, you can just visit their website.

http://www.arithmeum.uni-bonn.de/en/home/

The museum is closed on Montags.

I’m not exactly sure what a Theutometer is, but it seems to be available in their giftshop, and I would gladly accept it as a holiday gift.