sovereigns in Europe and the longest-serving national leader in the world at the time of his death. Honours Austria Austrian Imperial and Royal family: Knight with Collar of the Order of the Golden Fleece : Grand Cross of the Decoration of Honour for Services to the Republic of Austria, Grand Star Greek Royal Family: Knight Grand Cross of the Royal Order of the Redeemer Iranian Imperial Family: Recipient of the Commemorative Medal of the 2,500-year Celebration of the Persian Empire : Knight Grand Cross with Collar of the Order of the Holy Sepulchre : Knight Grand Cross with Collar of the Order of Pope Pius IX See also Princely Family of Liechtenstein References External links Princely House of Liechtenstein 1906 births 1989 deaths Liechtenstein people of Polish descent International Olympic Committee members Knights of the Golden Fleece of Austria Recipients of the Grand Star of the Decoration for Services to the Republic of Austria Princes of Liechtenstein Liechtenstein Roman Catholics World War II political leaders Knights of the Holy Sepulchre Knights Grand Cross of the Order of Pope Pius IX Honorary Knights of the Teutonic Order 20th-century Liechtenstein people