Famous Castles: Lists of famous castles, by country. Over 50 countries have been included. Lists include traditional castles as well as fortresses, strongholds, and a few fortified palaces and chateaus. As you can probably guess, I'm a huge fan of castles. I made these lists for when I'm travelling. Spanning a period of 900 years during the middle ages, castles come in many styles of architecture and design. Despite their differences though, they all have one feature in common-- they are fortified. Because of this, many are still standing today and can be visited when abroad.