Constructed towering fortresses

At what point in history were castles the best built and strongest? - Quora

Tower House Castles of Medieval Europe – The Freelance History Writer

Build towering castles

A medieval small fortress was a fortified structure built on a strategic location, featuring thick stone walls, defensive towers, and a guarded gatehouse. it had a central keep or tower for the

During the castle building of the Middle Ages, why were towers only ever round or square? - Quora

The World's 30 Most Impressive Fortresses

MOC-152895 Medieval Green Dragon Fortress Castle Model Building Blocks MOC Set by sir_wesley86

Fortified tower - Wikipedia

Building a Stone Fortress

World's Strongest Castles - Architecture of Cities