Antonija_Vranjes
Archeological Museum of Osijek is important sighteseeing place in Osijek where you can find a lot about history in general, starting with ancient Celts. Almost every Saturday Classical Music concerts are held here with interesting and every time different set list.
J0sipK
The archaeological museum is a part of the Slavonian museum (Muzej Slavonije). It's very interesting to watch at all the exposed materials from times before Christ to nowadays.This is the cheapest museum in which I ever was at. The standard entrance fee is 10 kunas (about 1.5 €), but for students it's only 5 kunas (about 0,7 €). It's located in the old part of Osijek, known as 'Tvrđa', on the main square, and across it is the other museum, the Slavonian museum.I suggest you to visit both museums, it's worth the experience.