I have visited the Klingenmuseum in Solingen several times. It is not an etnic museum, but shows an incredible collection on edged tools from all ages / origins. You'll find pieces dating from stone age, luristan, celtic / viking / till modern times. If you're fond of knives, it is a must see!
More info on
http://www.klingenmuseum.de/cms/index.php
cheers
Tim