|This article is part of the series:
Politics and government of
|Titles and honours|
|Precedent and law|
Caesar (plural Caesars; Latin: Caesar, plural: Caesares) is a title of imperial character. It derives from the cognomen of Julius Caesar, the Roman dictator. The change from being a familial name to a title adopted by the Roman Emperors can be dated to about AD 68/69, the so-called "Year of the Four Emperors".
Onomastic root 
Although the etymology of the name of Julius Caesar is not known with certainty, many scholars believe that it was simply a use of the Latin expression caesar meaning hairy. The Julii Caesares were a specific branch of the gens Julia. The first known bearer of the name was one Sextus Julius Caesar, praetor in 208 BC, who might have been conspicuous for having a fine head of hair (alternatively, given the Roman sense of humour and Julius Caesar's own receding hairline, it could be that the family branch was conspicuous for going bald).
The first Emperor, Caesar Augustus, bore the name as a matter of course; born Gaius Octavius, he was posthumously adopted by Caesar in his will, and per Roman naming conventions was renamed "Gaius Julius Caesar Octavianus" (usually called "Octavian" in English when referring to this stage of his life).
Sole Roman Emperor 
For political and personal reasons Octavian chose to emphasise his relationship with Caesar by styling himself simply "Imperator Caesar" (whereto the Roman Senate added the honorific Augustus, "Majestic" or "Venerable", in 27 BC), without any of the other elements of his full name. His successor as emperor, his stepson Tiberius, also bore the name as a matter of course; born Tiberius Claudius Nero, he was adopted by Caesar Augustus on June 26, 4 AD, as "Tiberius Iulius Caesar". The precedent was set: the Emperor designated his successor by adopting him and giving him the name "Caesar".
The fourth Emperor, Claudius, was the first to assume the name "Caesar" upon accession, without having been adopted by the previous emperor; however, he was at least a member by blood of the Julio-Claudian dynasty, being the nephew of Tiberius and the uncle of Caligula. Claudius in turn adopted his stepson and grand-nephew Lucius Domitius Ahenobarbus, giving him the name "Caesar" in the traditional way; his stepson would rule as the Emperor Nero. The first emperor to assume the position and the name simultaneously without any real claim to either was the usurper Servius Sulpicius Galba, who took the imperial throne under the name "Servius Galba Imperator Caesar" following the death of the last of the Julio-Claudians, Nero, in 68. Galba helped solidify "Caesar" as the title of the designated heir by giving it to his own adopted heir, Lucius Calpurnius Piso Frugi Licinianus.
Galba's reign did not last long and he was soon deposed by Marcus Otho. Otho did not at first use the title "Caesar" and occasionally used the title "Nero" as emperor, but later adopted the title "Caesar" as well. Otho was then defeated by Aulus Vitellius who acceded with the name "Aulus Vitellius Germanicus Imperator Augustus." Vitellius did not adopt the cognomen "Caesar" as part of his name, and may have intended to replace it with "Germanicus" (he bestowed the name "Germanicus" upon his own son that year).
Nevertheless, Caesar had become such an integral part of the imperial dignity that its place was immediately restored by Titus Flavius Vespasianus ("Vespasian"), whose defeat of Vitellius in 69 put an end to the period of instability and began the Flavian dynasty. Vespasian's son, Titus Flavius Vespasianus became "Titus Caesar Vespasianus".
Minor dynastic title 
By this point the status of "Caesar" had been regularised into that of a title given to the Emperor-designate (occasionally also with the honorific title Princeps Iuventutis, "Prince of Youth") and retained by him upon accession to the throne (e.g., Marcus Ulpius Traianus became Marcus Cocceius Nerva's designated heir as Caesar Nerva Traianus in October 97 and acceded on January 28, 98 as "Imperator Caesar Nerva Traianus Augustus"). After some variation among the earliest Emperors, the style of the Emperor-designate was NN. Caesar before accession and Imperator Caesar NN. Augustus after accession; starting with Publius Septimius Geta, it became customary to style the Emperor-designate as NN. Nobilissimus Caesar ("NN. Most Noble Caesar") rather than simply NN. Caesar.
Late Empire 
The use of Caesar for the junior partner in a consortium imperii naturally occurred also in break-away 'empires', eager to copy the Rome-proper original; e.g. the last Gallic emperor, Tetricus I, granted the title to his son, Tetricus II.
On March 1, 293, Gaius Aurelius Valerius Diocletianus established the Tetrarchy, a system of rule by two senior Emperors and two junior sub-Emperors. The two coequal senior emperors were styled identically to previous Emperors, as Imperator Caesar NN. Pius Felix Invictus Augustus ("Elagabalus" had introduced the use of Pius Felix, "the Pious and Blessed", while Gaius Iulius Verus Maximinus "Thrax" introduced the use of Invictus, "the Unconquered"), and were called the Augusti, while the two junior sub-Emperors were styled identically to previous Emperors-designate, as NN. Nobilissimus Caesar. Likewise, the junior sub-Emperors retained the title "Caesar" upon accession to the senior position.
The Tetrarchy was quickly abandoned as a system (though the four quarters of the empire survived as praetorian prefectures) in favour of two equal, territorial emperors, and the previous system of Emperors and Emperors-designate was restored, both in the Latin-speaking West and the Greek-speaking East.
Eastern Roman Empire 
In the Eastern Roman Empire (called "Byzantine Empire" by later historians), Caesar (Greek: Καῖσαρ) continued in existence as a title marking out the heir-apparent, although since the time of Theodosius I, most emperors chose to solidify the succession of their intended heirs by raising them to co-emperors. Hence the title was more frequently awarded to second- and third-born sons, or to close and influential relatives of the Emperor: thus for example Alexios Mosele was the son-in-law of Theophilos, Bardas was the uncle and chief minister of Michael III, while Nikephoros II awarded the title to his father, Bardas Phokas. An exceptional case was the conferment of the dignity and its insignia to the Bulgarian khan Tervel by Justinian II, who had helped him regain his throne in 705. The title was awarded to the nephew of Empress Maria of Alania, George II of Georgia in 1081.
According to the Klētorologion of 899, the Byzantine Caesar's insignia were a crown without a cross, and the ceremony of a Caesar's creation (in this case dating to Constantine V), is included in De Ceremoniis I.43. The title remained the highest in the imperial hierarchy until the introduction of the sebastokratōr (a portmanteau word meaning "majestic ruler" derived from sebastos and autokratōr, the Greek equivalents of Augustus and imperator) by Alexios I Komnenos and later of despotēs by Manuel I Komnenos. The title remained in existence through the last centuries of the Empire. In the Palaiologan period, it was held by prominent nobles like Alexios Strategopoulos, but from the 14th century, it was mostly awarded to foreign rulers of the Balkans such as the princes of Wallachia, Serbia and Thessaly. In the mid-14th century Book of Offices of pseudo-Kodinos, the rank comes between the sebastokratōr and the megas domestikos.
Ottoman Empire 
In the Middle East, the Persians and later the Arabs continued to refer to the Roman and Byzantine emperors as "Caesar" (in Persian قیصر روم Qaisar-e-Rūm). Thus, following the conquest of Constantinople in 1453, the victorious Ottoman sultan Mehmed II was the first of the rulers of the Ottoman Empire to assume the title "Caesar of the Roman Empire" (Ottoman Turkish Kayser-i-Rûm). Here, the Caesar title should not be understood as the minor title it had become, but as the glorious title of the emperors of the past, a connotation that had been preserved in Persian and Arabic. The adoption of the title also implied that the Ottoman state considered itself the continuation, by absorption, of the Roman Empire, a view not shared in the West. Acting in his capacity as Caesar of the Roman Empire, Mehmed reinstated the defunct Ecumenical Patriarchate of Constantinople.
The history of "Caesar" as an imperial title is reflected by the following monarchic titles, usually reserved for "Emperor" and "Empress" in many languages (note that the name Caesar, pronounced see-zer in English, was pronounced kai-sahr in Classical Latin):
- Danish: Kejser & Kejserinde;
- Dutch: Keizer & Keizerin;
- German: Kaiser & Kaiserin;
- Icelandic: Keisari & Keisaraynja;
- Faroese: Keisari & Keisarinna;
- Norwegian: Keiser & Keiserinne;
- Swedish: Kejsare & Kejsarinna
- Old English: cāsere
- Belarusian: Цар & Царыца (Tsar & Tsarytsa)
- Bulgarian: Цар & Царица (Tsar & Tsaritsa);
- Croatian: Car & Carica (c is read ts);
- Czech: Císař & Císařovna;
- Latvian: Ķeizars & Ķeizariene;
- Macedonian: Кајсар & Кајсарица (Kajsar & Kajsarica c is read ts)
- Polish: Cesarz & Cesarzowa;
- Russian: Царь & Царица, Czar & Czaritsa (archaic transliteration), Tsar & Tsaritsa (modern transliteration); however in the Russian empire (also reflected in some of its other languages), which aimed to be the "third Rome" as successor to the Byzantine empire, it was abandoned (not in the foreign language renderings though) as imperial style - in favor of Imperator and Autocrator - and used as a lower, royal style as within the empire in chief of some of its parts, e.g. Georgia and Siberia
- In the United States and, more recently, Britain, the title "czar" (from the Russian title) is a slang term for certain high-level civil servants, such as the "drug czar" for the director of the Office of National Drug Control Policy and "terrorism czar" for a Presidential advisor on terrorism policy. More specifically, a czar refers to a sub-cabinet level advisor within the executive branch of the U.S. government.
- Serbian: Цар & Царица / Car & Carica (pronounced Tsar & Tsaritsa)
- Slovak: Cisár & Cisárovná;
- Slovene: Cesar & Cesarica;
- Persian: Ghaysar قيصر
- Urdu: Qaysar قيصر used in the title "Kaiser-i-Hind" ("Emperor of India") during the British Raj
- Georgian: კეისარი (Keisari)
- Turkish: Kayser (historical), Sezar (modern). Kayser-i-Rûm "Caesar of [Constantinople, the second] Rome", one of many subsidiary titles proclaiming the Ottoman Great Sultan (main imperial title Padishah) as (Muslim) successor to "Rum" as the Turks called the (Christian) Roman Empire (as Byzantium had continued to call itself), continuing to use the name for part of formerly Byzantine territory (compare the Seljuk Rum-sultanate)
- Estonian: Keiser & Keisrinna;
- Finnish: Keisari & Keisarinna or Keisaritar;
- Hungarian: Császár & Császárnő;
- Bahasa Indonesia: Kaisar;
- Albanian: Çezar & Qesarinë;
- Armenian: կայսր Kaysr, and կայսրություն Kaysrutiun meaning empire;
In various Romance and other languages, the imperial title was rather based on the Latin Imperator (in fact a military mandate or a victory title), but Caesar or a derivation is then still used for both the name and the minor ranks (still perceived as Latin)
There have been other cases of a noun proper being turned into a title, such as Charlemagne's Latin name, including the epithet, Carolus (magnus) becoming Slavonic titles rendered as King: Kralj (Serbo-Croat), Král (Czech) and Król (Polish), etc.
However certain languages, especially Romance languages, also commonly use a 'modernized' word (e.g. César in French) for the name, both referring to the Roman cognomen and modern use as a first name, and even to render the title Caesar, sometimes again extended to the derived imperial titles above.
See also 
- Aldrete, Gregory S.: Daily Life In The Roman City: Rome, Pompeii, And Ostia, pg. 145, Greenwood Press, 2004, ISBN 978-0-313-33174-9
- Cokayne, Karen: Experiencing Old Age in Ancient Rome, pg. 14, Routledge, 2003, ISBN 0-415-29914-4.
- Bury, John B. (1911). The Imperial Administrative System of the Ninth Century – With a Revised Text of the Kletorologion of Philotheos. Oxford University Publishing. p. 36.
- Kazhdan, Alexander, ed. (1991). Oxford Dictionary of Byzantium. Oxford University Press. p. 363. ISBN 978-0-19-504652-6.
- Kazhdan, Alexander, ed. (1991). Oxford Dictionary of Byzantium. Oxford University Press. pp. 363, 2026. ISBN 978-0-19-504652-6.
- Bury, John B. (1911). The Imperial Administrative System of the Ninth Century – With a Revised Text of the Kletorologion of Philotheos. Oxford University Publishing. pp. 20, 36.
- Norwich, John Julius (1995). Byzantium:The Decline and Fall. New York: Alfred A. Knopf. pp. 81–82. ISBN 0-679-41650-1.
- Pauly-Wissowa – Realencyclopädie der Classischen Altertumswissenschaft