Today, in between my guest lectures here at Poznan University, I've visited one of the 6(!) military museums located in the city. The Wielkopolska Military Museum collection illustrates the arms development in Poland from the 11th century to the present day. I strongly recommend it to anyone interested in the 17th/18th century struggles of the Poles against the Cossacks, Tatars, Ottomans and Swedes.
Cheers,
Mats