Both territories were extensively fortified throughout the centuries, as evidenced by the existence of around 21 castles or castle ruins, many of which can still be visited today.
Mõlemad territooriumid olid sajandite jooksul laialdaselt kindlustatud, mida tõestab ligi 21 lossi või lossivareme olemasolu, millest paljusid saab ikka veel külastada.