Prince Joseph Wenzel of Liechtenstein
Prince Joseph Wenzel of Liechtenstein, Count Rietberg( born 24 May 1995) is the eldest child of Prince Alois of Liechtenstein, the Regent and Hereditary Prince of Liechtenstein, and his wife Princess Sophie of Bavaria, Duchess in Bavaria, he is also the eldest grandchild of the current ruling prince of Liechtenstein.
He is second in the line of succession to the Liechtensteiner throne through his father.
Joseph Johann Adam, Prince of Liechtenstein
Joseph Johann Adam, Prince of Liechtenstein (25 May 1690 – 17 December 1732) was the Prince of Liechtenstein from 1721 to his death.
Born in Vienna, he was the only living son of Anton Florian, Prince of Liechtenstein.
Johann Josef Adam served under his father for a short time during the War of the Spanish Succession and later fought against the French under the Duke of Marlborough.
After the Treaty of Utrecht he became Imperial Privy Counsellor in Vienna.
He was the 661st Knight of the Order of the Golden Fleece in Austria.
He died in Valtice in 1732.
Prince Emanuel of Liechtenstein (1700–1771)
Prince Emanuel of Liechtenstein( Emanuel Joseph Johann; 2 February/ 3 February 1700, in Vienna – 15 January 1771, in Vienna) was the father and brother to two of Liechtenstein's monarchs.
Emanuel was the second son of Prince Philipp Erasmus of Liechtenstein( 11 September 1664 – 13 January 1704) and Countess Christina Theresa von Löwenstein- Wertheim- Rochefort( 12 October 1665 – 14 April 1730).
He was brother to Josef Wenzel, Prince of Liechtenstein.
In 1749 he became the 734th Knight of the Order of the Golden Fleece.
He married" Maria" Anna" Antonia" Gräfin von Dietrichstein- Weichselstädt Freiin zu Hollenburg und Finkenstein( Graz, 10 September
1706- Vienna, 7 January 1777) on 14 January 1726 in Vienna.
They had thirteen children.
Their eldest son became monarch of Liechtenstein when Emanuel's brother died without any surviving heirs.
Anton Florian, Prince of Liechtenstein
Anton Florian (28 May 1656 – 11 October 1721) was the Prince of Liechtenstein between 1718 and 1721.
He was born in Wilfersdorf, in what is now Lower Austria.
During the War of the Spanish Succession, he went to Spain, where he was the Chief Intendant and Prime Minister of the Archduke Karl, who became Emperor Charles VI after the sudden death of his brother in 1711.
Florian returned to Vienna for Charles's coronation.
He was the Imperial Chief Intendant and Chairman of the Secret Council until he died in 1721.
On 23 January 1719, Charles VI created the new principality of Liechtenstein from the domains of Seigneury of Schellenberg and County of Vaduz, which were both held by the Liechtenstein family.
This was done so that Anton Florian could be admitted to the Reichstag, which required that all members had land that was subordinate only to the Emperor himself (as opposed to land held in fief by higher nobles).
Thus, Anton Florian became the first Prince of Liechtenstein.
It is the only monarchy of the Holy Roman Empire that still exists.
He was the 591st Knight of the Order of the Golden Fleece in Austria.
He died in Vienna in 1721.
Franz I, Prince of Liechtenstein
Franz I, Prince of Liechtenstein, born" Franz de Paula Maria Karl August"( 28 August 1853 – 25 July 1938), was the Prince of Liechtenstein between 1929 and 1938.
Prince Wenzeslaus of Liechtenstein
Prince Wenzeslaus of Liechtenstein (born 12 May 1974) is a member of the princely family of Liechtenstein.
He is the son of Prince Philip Erasmus of Liechtenstein and Isabelle de L'Arbre de Malander.
He was born to the style of a Serene Highness and Prince of Liechtenstein, and is additionally a Count of Rietberg.
Prince Wenzeslaus has two brothers:
Prince Wenzeslaus has become something of a society column figure on account of his relationship with Victoria's Secret model Adriana Lima.
The society columns such as Page Six of the "New York Post" have tagged him with the nickname of "Prince Wence(pronounced: Vince)".
His father is President of the LGT Group in Liechtenstein which is privately owned by the Prince of Liechtenstein Foundation.
Prince Wenzeslaus is the nephew of the reigning sovereign Fürst Hans Adam II and the first cousin of Alois, Hereditary Prince of Liechtenstein, who is Regent since 2004.
Johann I Joseph, Prince of Liechtenstein
Johann I Joseph(" Johann Baptist Josef Adam Johann Nepomuk Aloys Franz de Paula"; 26 June 1760 – 20 April 1836) was Prince of Liechtenstein between 1805 and 1806 and again from 1814 until 1836.
He was the last Liechtenstein prince to rule under the Holy Roman Empire between 1805 and 1806 and as regent of Liechtenstein from 1806 until 1814.
He was the fourth son of Franz Joseph I, Prince of Liechtenstein.
Prince Nikolaus of Liechtenstein
Prince Nikolaus Ferdinand Maria Josef Raphael of Liechtenstein( born 24 October 1947) is the non-resident Ambassador of Liechtenstein to the Holy See and a younger brother of the reigning Prince of Liechtenstein, Hans- Adam II.
Hans-Adam I, Prince of Liechtenstein
Hans- Adam I, Prince of Liechtenstein( Johann Adam Andreas; 16 August 1662, in Brno – 16 June 1712, in Vienna) was the son of Karl Eusebius, Prince of Liechtenstein( 1611 –1684) and Princess Johanna Beatrix of Dietrichstein( 1625 – 1676).
On 18 January 1699 he acquired the seigneury of Schellenberg, and on 22 February 1712 the county of Vaduz.
These two domains would later form the present principality of Liechtenstein.
He was also Duke of Troppau and Jägerndorf.
Johann did not take up an office at the Imperial court but did case- by- case work, especially as a financial expert.
He was known informally as Hans Adam the Rich.
Besides managing his property, he took a great interest in art.
He bought works by Rubens and van Dyck for his collections and was one of the most generous patrons of his time.
Johann created two memorials to himself, a palace in Bankgasse in Vienna and a summer palace in Rossau.
He was the 575th Knight of the Order of the Golden Fleece in Austria.
Anna Maria of Liechtenstein
Anna Maria Antonie of Liechtenstein( 11 September 1699 in Vienna – 20 January 1753 in Vienna), was a princess consort of Liechtenstein; married 19 April 1718 to her cousin prince Joseph Wenzel I, Prince of Liechtenstein.

Question: When did Joseph Johann Adam, Prince Of Liechtenstein's father die?
Answer: 11 October 1721