Most of the time,they are. But they are also used for visitors,presidents,etc
usually people of high royalty like kings to attack enemy castles
Only some vampires own castles, it might be for different reasons, like they are "vampire royalty" or they just plainly want to stay out of people's way.
Castles were mainly used to protect Kings and people of royalty within the kingdom. They were also a shelter for the villagers, incase an invasion/war was about to take place. Castles hold prisoners and they hold valuable resources for the people. Castles were also a place of entertainment.
The first castle were a defencestructure or a fortress. Monarch (royalty) or nobles were the usual residents of these castles.
The types were mott and bailey. Stone keep castles, Military castles, castles for royalty, rich, lords, and nyone who could afford a castle
Castles were built only for kings because they were used to keep the kings built.
Not really, most castles were mainly built for defensive reasons, to dominate a particular part of the countryside and to house troops. That is not to say that there are no royal castles, there are (e.g. Windsor Castle).
Purple became a color of royalty because it was difficult and very costly to make that color in clothing and the like. Basically, only royalty could afford the costs.
royalty, or rich people nowadays middle aged rich ones
The color purple is a sign of royalty. Disney's Magic Kingdom is a theme park filled with castles, princes and princesses among other Disney characters. The color purple is used to direct you because of that link of royalty.
Castles were primarily used for defense and protection during medieval times. They served as strongholds to house royalty, nobility, and soldiers, and were equipped with features like walls, moats, drawbridges, and towers to defend against attacks. Castles also functioned as administrative centers and symbols of power and authority.
Some were built as homes for royalty. Gottorf started out as the home of a bishop and became the home of the Duke of Schleswig-Holstein-Gottorf. Glucksburg Castle was used by Danish kings.