A castle is a defensive, medieval structure seen as one symbols of the Dark Ages. The term has a history of scholarly debate surrounding its exact meaning, but is usually regarded as being distinct from the general terms fort or fortress. The word "castle" (castel) was introduced to denote this new type of fortress, and then new to England, brought in by the Norman knights. A French castle is a chteau-fort, for in French a simple chteau connotes a grand country house at the center of an estate. When European castles were opened up and expanded into pleasure dwellings and powerhouses, often remained attached to the dwelling, resulting in many non-military castles and chteaux. In Germany there are two names for what would be called a castle in English, Burg and Schloss. However, these are not usually palaces in the French style, but instead are styled on medieval mountain castles and fairytale notions, and from all appearances are often castles to an English speaker.
Voluntary or intended. These adjectives mean being or resulting from one's own free will. Voluntary implies the operation of unforced choice.
Incarceration is the detention of a person in jail or prison. People are most commonly incarcerated upon suspicion (or conviction) of committing a crime.
White Castle or Voluntary Incarceration by George Grie. Modern art surrealism print, poster, wallpaper.