Ferdinand IV (September 8, 1633 - July 9, 1654) was King of the Romans, of Hungary, and of Bohemia. September 8 is the 251st day of the year (252nd in leap years). ... Events February 13 - Galileo Galilei arrives in Rome for his trial before the Inquisition. ... July 9 is the 190th day of the year (191st in leap years) in the Gregorian Calendar, with 175 days remaining. ... Events April 5 - Signing of the Treaty of Westminster, ending the First Anglo-Dutch War. ... The title King of the Romans (Latin: Rex Romanorum) — not to be confused with the early, partially mythical Kings of Rome — was carried by Holy Roman Emperors after they had been confirmed as Emperor, but before they had undergone the ceremony of coronation by the Pope. ... Bohemia This article is about the historical region in central Europe; for other uses, see Bohemia (disambiguation). ...

He was born in Vienna, the eldest son of Emperor Ferdinand III and his first wife, Infanta Maria Anna of Spain (daughter of King Philip III of Spain). He was made King of Bohemia in 1646, King of Hungary in 1647, and was elected King of the Romans (future ruler of the Holy Roman Empire) on May 31, 1653, and crowned at Ratisbon (Regensburg) on June 18 of the same year. He died in Vienna, predeceasing his father, leaving his younger brother, the future Leopold I, Holy Roman Emperor, as heir. Vienna (German: Wien [viːn]; Slovenian: Dunaj, Hungarian: Bécs, Czech: Vídeň, Slovak: Viedeň, Romany Vidnya; Croatian and Serbian: Beč) is the capital of Austria, and also one of the nine States of Austria. ... Ferdinand III, Holy Roman Emperor Ferdinand III, Holy Roman Emperor (July 13, 1608 – April 2, 1657), ruled February 15, 1637 – 1657. ... Philip III of Spain Philip III (Spanish: Felipe III) (April 14, 1578 – March 31, 1621) was the king of Spain and Portugal (as Philip II Portuguese: Filipe II), from 1598 until his death. ... Bohemia This article is about the historical region in central Europe; for other uses, see Bohemia (disambiguation). ... The Holy Roman Empire of the German Nation (German: Heiliges Römisches Reich Deutscher Nation ▶ (help· info), Latin Sacrum Romanum Imperium Nationis Germanicae, see names and designations of the empire) was a political conglomeration of lands in Central Europe in the Middle Ages and the early modern period. ... Regensburg (English formerly Ratisbon, Latin Ratisbona, Czech Řezno) is a city (population 150,212 in 2004) in Bavaria, south-east Germany, located at the confluence of the Danube and Regen rivers, at the northernmost bend in the Danube. ... Leopold I, Holy Roman Emperor Leopold I Habsburg (June 9, 1640 – May 5, 1705), Holy Roman emperor, was the second son of the emperor Ferdinand III and his first wife Maria Anna, daughter of Philip III of Spain. ...