What are some of the best fortified historical fortresses in your opinion? - Quora

How can a fortified position be captured (military)? - Quora

What is your favorite European castle? - Quora

When were the first castles built in France? - Quora

What are some of the best fortified historical fortresses in your opinion? - Quora

What happened to all the abandoned castles from medieval times? Why were so many castles built that were never used or conquered? - Quora

What are/have been the most impregnable fortresses in history? - Quora

Are there any European cities with a fortress left? - Quora

What are some of the greatest fortresses ever built (they have been successful in repelling invaders and/or are impressive in terms of their size and ingenuity)? - Quora

Is there a castle or Fort that is still used by an army today in any capacity? - Quora

What are some Romanian historical landmarks? - Quora