Archduchess Maria Theresa of Austria (1762–1770)
Archduchess Maria Theresa of Austria (20 March 176223 January 1770) was a daughter of Joseph II, Holy Roman Emperor, and his first wife, Isabella of Parma.
Archduke Ernest of Austria
Archduke Ernest of Austria (15 June 1553 – 20 February 1595) was an Austrian prince, the son of Maximilian II, Holy Roman Emperor, and Maria of Spain.
Born in Vienna, he was educated with his brother Rudolf II, Holy Roman Emperor, in the court of Spain.
In 1573 and 1587, he was a candidate for the throne of Poland.
From 1576 onwards, he was governor in the Archduchy of Austria, where he promoted the counterreformation.
In 1590, he became governor of Inner Austria as regent for his young cousin Ferdinand, and from 1594 to 1595 he served as governor of the Spanish Netherlands.
He died in Brussels in 1595.
Dirck de Quade van Ravesteyn
Dirk de Quade van Ravesteyn( 1565 – 1620), was a Dutch Golden Age painter active in the court of Rudolf II, Holy Roman Emperor.
Frederick II, Holy Roman Emperor
Frederick II (26 December 1194 – 13 December 1250) was King of Sicily from 1198, King of Germany from 1212, King of Italy and Holy Roman Emperor from 1220 and King of Jerusalem from 1225.
He was the son of emperor Henry VI of the Hohenstaufen dynasty and of Constance, heiress to the Norman kings of Sicily.
His political and cultural ambitions were enormous as he ruled a vast area, beginning with Sicily and stretching through Italy all the way north to Germany.
As the Crusades progressed, he acquired control of Jerusalem and styled himself its king.
However, the Papacy became his enemy, and it eventually prevailed.
Viewing himself as a direct successor to the Roman emperors of antiquity, he was Emperor of the Romans from his papal coronation in 1220 until his death; he was also a claimant to the title of King of the Romans from 1212 and unopposed holder of that monarchy from 1215.
As such, he was King of Germany, of Italy, and of Burgundy.
At the age of three, he was crowned King of Sicily as a co-ruler with his mother, Constance of Hauteville, the daughter of Roger II of Sicily.
His other royal title was King of Jerusalem by virtue of marriage and his connection with the Sixth Crusade.
Frequently at war with the papacy, which was hemmed in between Frederick's lands in northern Italy and his Kingdom of Sicily (the "Regno") to the south, he was excommunicated four times and often vilified in pro-papal chronicles of the time and after.
Pope Gregory IX went so far as to call him an Antichrist.
Speaking six languages (Latin, Sicilian, Middle High German, Langues d'oïl, Greek and Arabic), Frederick was an avid patron of science and the arts.
He played a major role in promoting literature through the Sicilian School of poetry.
His Sicilian royal court in Palermo, beginning around 1220, saw the first use of a literary form of an Italo-Romance language, Sicilian.
The poetry that emanated from the school had a significant influence on literature and on what was to become the modern Italian language.
He was also the first king to formally outlaw trial by ordeal, which had come to be viewed as superstitious.
After his death his line did not survive, and the House of Hohenstaufen came to an end.
Furthermore, the Holy Roman Empire entered a long period of decline from which it did not completely recover until the reign of Charles V, 250 years later.
Historian Donald Detwiler wrote:
David Ungnad von Sonnegg
David Ungnad von Sonnegg was an envoy( title) of Maximilian II, Holy Roman Emperor( Holy Roman Empire) next to Selim II( Sublime Porte),.
Maria Amalia, Duchess of Parma
Maria Amalia (Maria Amalia Josepha Johanna Antonia; 26 February 1746 – 18 June 1804) was the Duchess of Parma, Piacenza and Guastalla by marriage.
Maria Amalia was a daughter of Empress Maria Theresa and
Emperor Francis I. She was thus younger sister to Joseph II, Holy Roman Emperor and older sister to Leopold II, Holy Roman Emperor, Maria Carolina, Queen of Naples and Marie Antoinette, Queen of France.
Henry VI, Holy Roman Emperor
Henry VI (Heinrich VI) (November 1165 – 28 September 1197), a member of the Hohenstaufen dynasty, was King of Germany
(King of the Romans) from 1190 and Holy Roman Emperor from 1191 until his death.
From 1194 he was also King of Sicily.
He was the second son of Emperor Frederick Barbarossa and his consort Beatrix of Burgundy.
In 1186 he was married to Constance of Sicily, the posthumous daughter of the Norman king Roger II of Sicily.
Henry, stuck in the Hohenstaufen conflict with the House of Welf until 1194, had to enforce the inheritance claims by his wife against her nephew Count Tancred of Lecce.
Henry's attempt to conquer the Kingdom of Sicily failed at the siege of Naples in 1191 due to an epidemic.
Based on an enormous ransom for the release of King Richard I of England, he conquered Sicily in 1194; however, the intended unification with the Holy Roman Empire ultimately failed due to the opposition of the Papacy.
Henry threatened to invade the Byzantine Empire after 1194 and succeeded in extracting a ransom, the Alamanikon, from Emperor Alexios III Angelos in return for cancelling the invasion.
In 1195 and 1196 Henry attempted to turn the Holy Roman Empire from an elective to a hereditary monarchy, the so-called "Erbreichsplan", but met strong resistance from the prince-electors and abandoned the plan.
Henry pledged to go on crusade in 1195 and began preparations.
A revolt in Sicily was crushed in 1197.
The Crusaders set sail for the Holy Land that same year but Henry died of illness at Messina on 28 September 1197 before he could join them.
His death plunged the Empire into the chaos of the German throne dispute for the next 17 years.
Margaret of Sicily
Margaret of Sicily( also called Margaret of Hohenstaufen or Margaret of Germany)( 1 December 1241, in Foggia – 8 August 1270, in Frankfurt- am- Main) was a Princess of Sicily and Germany, and a member of the House of Hohenstaufen.
By marriage she was Landgravine of Thuringia and Countess Palatine of Saxony( German:" Landgräfin von Thüringen und Pfalzgräfin von Sachsen").
She was the daughter of Frederick II, Holy Roman Emperor, King of Sicily and Germany, by his third wife, Isabella of England.
Her paternal grandparents were Henry VI, Holy Roman Emperor and Constance of Sicily.
Her maternal grandparents were John of England and Isabella of Angoulême.
Constance, Queen of Sicily
Constance I( 2 November 1154 – 27 November 1198) was Queen regnant of Sicily in 1194 – 98, jointly with her spouse from 1194 to 1197, and with her infant son Frederick II, Holy Roman Emperor, in 1198, as the heiress of the Norman kings of Sicily.
She was also Holy Roman Empress by marriage to Henry VI, Holy Roman Emperor.
Anna of Hohenstaufen
Anna of Hohenstaufen( 1230 – April 1307), born Constance, was an Empress of Nicaea.
She was a daughter of Frederick II, Holy Roman Emperor and Bianca Lancia.

Question: Where did Frederick Ii, Holy Roman Emperor's father die?
Answer: Messina