[1] https://en.wikipedia.org/wiki/Allodial_title
[2] from memory - the actual phrase might be slightly different
[1] https://en.wikipedia.org/wiki/Allodial_title
[2] from memory - the actual phrase might be slightly different
The original Liechtenstein was a castle in Austria. The family shopped around for some land that was held directly from the Holy Roman Emperor, rather than through some intermediate feudal lord, and bought it. That gave them statehood within the Holy Roman Empire, and raised the head of the house to the status of Prince.
They didn't even visit the current Liechtenstein for many years -- it was basically a flag of convenience.
The Crown 'owns' the Crown estate as a corporation sole [0], a legal entity occupied by a single person, the Monarch. When the Queen died, the Crown persisted as a legal entity but the Monarch changed. King Charles owns several properties that are not part of the Crown estate, e.g. Balmoral and Sandringham. These were purchased by members of the Royal family from other members of the aristocracy in the 19th Century.
[0] https://en.wikipedia.org/wiki/Corporation_sole#The_Crown
The titles are held in the monarchs name, so if the monarch should fall then the title becomes null and void.
Basically in law: the crown is Britain, and the deed given is stated “so long as Britain shall exist”.