A castle is a fortified residence for a medieval noble. Castles come in all shapes and sizes, but knowing a few general terms will help you understand them. The Keep (or Donjon): A high, strong stone tower in the center of the castle complex that was the lord's home and refuge of last resort.
While the signature Gothic style originated in France, the architectural movement spread across Europe, especially in Italy, Spain, Germany and Britain. Some of the best Gothic architecture examples can be seen in France, one of the earliest being the Basilica of Saint-Denis in Paris completed in 1144 CE.