Search for: [Subject and Keywords = cannonballs] OR [Subject and Keywords = Middle Ages] OR [Subject and Keywords = Olsztyn] OR [Subject and Keywords = artillery] OR [Subject and Keywords = ceramic projectiles] OR [Subject and Keywords = rocks used in the production of ammunition] OR [Subject and Keywords = kule armatnie] OR [Subject and Keywords = średniowiecze] OR [Subject and Keywords = Olsztyn \(Polska\)] OR [Subject and Keywords = artyleria] OR [Subject and Keywords = pociski gliniane] OR [Subject and Keywords = surowce skalne w produkcji amunicji] OR [Title = Cannonballs from the Olsztyn turret] OR [Creator = Strzyż, Piotr] OR [Creator = Czubla, Piotr] OR [Creator = Mackiewicz, Adam]