Kastel.
Kastel Fortress is a fortress located in Banja Luka, Bosnia and Herzegovina. The fortress is medieval but is situated on the site of previous fortifications going all the way back to Roman and even pre-Roman times.
Kastel Fortress is a fortress located in Banja Luka, Bosnia and Herzegovina. The fortress is medieval but is situated on the site of previous fortifications going all the way back to Roman and even pre-Roman times.