The Princely House of Liechtenstein is one of the oldest noble families. The family has over 100 members of whom only a part live in the Principality of Liechtenstein.
The Reigning Prince is the sovereign of the Princely House and watches over the "reputation, honour and welfare" of the Princely House according to the house laws. Prince Hans-Adam II took over the regency on the 13th of November 1989 after the death of Prince Franz Josef II.
The Princely House elects every five years a family council, which acts as a court of appeal for decisions in the context of the house laws.
Prince Hans-Adam II. and Princess Marie have four children: