Prince of the Holy Roman Empire in the context of "Imperial Free City"

Ferdinand II (9 July 1578 – 15 February 1637) was Holy Roman Emperor, King of Bohemia, Hungary, and Croatia from 1619 until his death in 1637. He was the son of Archduke Charles II of Inner Austria and Maria of Bavaria, who were devout Catholics. In 1590, when Ferdinand was 11 years old, they sent him to study at the Jesuits' college in Ingolstadt because they wanted to isolate him from the Lutheran nobles. A few months later, his father died, and he inherited Inner Austria–Styria, Carinthia, Carniola and smaller provinces. His cousin, Rudolf II, Holy Roman Emperor, who was the head of the Habsburg family, appointed regents to administer these lands.

Ferdinand was installed as the actual ruler of the Inner Austrian provinces in 1596 and 1597. Rudolf II also charged him with the command of the defense of Croatia, Slavonia, and southeastern Hungary against the Ottoman Empire. Ferdinand regarded the regulation of religious issues as a royal prerogative and introduced strict Counter-Reformation measures from 1598. First, he ordered the expulsion of all Protestant pastors and teachers; next, he established special commissions to restore the Catholic parishes. The Ottomans captured Nagykanizsa in Hungary in 1600, which enabled them to invade Styria. A year later, Ferdinand tried to recapture the fortress, but the action ended in November 1601 with a defeat, due to unprofessional command of his troops. During the first stage of the family feud known as the Brothers' Quarrel, Ferdinand initially supported Rudolph II's brother, Matthias, who wanted to convince the melancholic emperor to abdicate, but Matthias' concessions to the Protestants in Hungary, Austria, and Bohemia outraged Ferdinand. He planned an alliance to strengthen the position of the Catholic Church in the Holy Roman Empire, but the Catholic princes established the Catholic League without his participation in 1610.

In the Holy Roman Empire, the collective term free and imperial cities (German: Freie und Reichsstädte), briefly worded free imperial city (Freie Reichsstadt, Latin: urbs imperialis libera), was used from the 15th century to denote a self-ruling city that had a certain amount of autonomy and was represented in the Imperial Diet.

An imperial city held the status of imperial immediacy, and was subordinate only to the Holy Roman Emperor, as opposed to a territorial city or town (Landstadt), which was subordinate to a territorial prince – be it an ecclesiastical lord (prince-bishop, prince-abbot), or a secular prince (duke (Herzog), margrave, count (Graf), etc.).

Prince Grigory Grigoryevich Orlov (Russian: Григорий Григорьевич Орлов; 17 October 1734 – 24 April 1783) was a favourite of the Empress Catherine the Great of Russia, Prince of the Holy Roman Empire (1772), state and military figure, collector, patron of arts, and General-in-Chief.

He patronised M. V. Lomonosov, D. I. Fonvisin, V. I. Bazhenov and gave them financial support. Honorary member of the Imperial Academy of Arts (since 1765). He collected paintings (including Rembrandt, P. P. Rubens, Titian), sculpture, Chinese, Japanese and Russian porcelain, hunting weapons, etc. (Orlov's collection has been preserved almost completely; it is now in the State Museum-Reserve "Gatchina" of the eponymous city). A large landowner, particularly of the Gatchina manor, where Orlov commissioned the construction of a palace and a landscape garden.

The Duchy of Lorraine was a principality of the Holy Roman Empire which existed from the 10th century until 1766 when it was annexed by the Kingdom of France. It gave its name to the larger present-day region of Lorraine in northeastern France. Its capital was Nancy.

It was founded in 959 following the division of Lotharingia into two separate duchies: Upper and Lower Lorraine, the westernmost parts of the Holy Roman Empire. The Lower duchy was quickly dismantled, while Upper Lorraine came to be known as simply the Duchy of Lorraine. The Duchy of Lorraine was coveted and briefly occupied by the dukes of Burgundy and the kings of France, but was ruled by the dukes of the House of Lorraine after 1473.

Berg (German pronunciation: [bɛʁk] ) was a state—originally a county, later a duchy—in the Rhineland of Germany. Its capital was Düsseldorf. It existed as a distinct political entity from the early 12th to the 19th centuries. It was a member state of the Holy Roman Empire.

The name of the county lives on in the modern geographic term Bergisches Land, often misunderstood as bergiges Land (hilly country).

Reuss (German: Reuß [ˈʁɔʏs] ) was the name of several historical states located in present-day Thuringia, Germany. Several lordships of the Holy Roman Empire which arose after 1300 and became Imperial Counties from 1673 and Imperial Principalities in the late 18th century were ruled by the House of Reuss.

A varying number of these counties came into being by partition; they were partially merged and divided again. After the end of the empire in 1806, the principality of the elder line, as well as several of the younger, became sovereign member states of the German Confederation, with the younger ones merging into a unified principality by 1848. The two remaining territories became federal principalities of the German Empire in 1871, the Principality of Reuss Elder Line with the state capital of Greiz and the Principality of Reuss Younger Line with the state capital of Gera. Both states were ruled by the House of Reuss until the German Revolution of 1918–1919. The head of each branch bore the German title Fürst (Prince, as head of a princely house) while their children and all other members of the house bore the title Prinz/Prinzessin (Prince/Princess, as agnate members of a princely house).

The House of Eggenberg was the name of an influential Austrian noble family from Styria, who achieved princely rank in the 17th century. The family's last male heir died in 1717, bringing an end to the House of Eggenberg.