''Decanus'' means "chief of ten" in

Late Latin Late Latin is the scholarly name for the form of Literary Latin of late antiquity.Roberts (1996), p. 537. English dictionary definitions of Late Latin date this period from the 3rd to 6th centuries CE, and continuing into the 7th century in ...

. The term originated in the

Roman army The Roman army () served ancient Rome and the Roman people, enduring through the Roman Kingdom (753–509 BC), the Roman Republic (509–27 BC), and the Roman Empire (27 BC–AD 1453), including the Western Roman Empire (collapsed Fall of the W ...

and became used thereafter for subaltern officials in the

Byzantine Empire The Byzantine Empire, also known as the Eastern Roman Empire, was the continuation of the Roman Empire centred on Constantinople during late antiquity and the Middle Ages. Having survived History of the Roman Empire, the events that caused the ...

, as well as for various positions in the Church, whence derives the English title " dean". It is unrelated to the position of

deacon A deacon is a member of the diaconate, an office in Christian churches that is generally associated with service of some kind, but which varies among theological and denominational traditions. Major Christian denominations, such as the Cathol ...

(Latin ''diaconus'', Greek ''διάκονος'').

History and functions

The ''decanus'' was originally the leader of a 10-man '' contubernium'', which consisted of the squad of eight

legionaries The ancient Rome, Roman legionary (in Latin ''legionarius''; : ''legionarii'') was a citizen soldier of the Roman army. These soldiers would conquer and defend the territories of ancient Rome during the Crisis of the Roman Republic, Republic and ...

who lived in the same tent, plus the two support units/servants of the contubernium. The title must not be confused with the ''

decurio ''Decurio'' was an official title in Ancient Rome, used in various connections: * Decurion (administrative), a member of the senatorial order in the Italian towns under the administration of Rome, and later in provincial towns organized on the Ita ...

'', which was a title given to civic officials and to leaders of 30-strong squadrons (''

turma A ''turma'' (; plural ''turmae''; ) was a cavalry unit in the Roman army of the Republic and Empire. In the Byzantine Empire, it became applied to the larger, regiment-sized military-administrative divisions of a '' thema''. The word is often tran ...

e'') of

cavalry Historically, cavalry (from the French word ''cavalerie'', itself derived from ''cheval'' meaning "horse") are groups of soldiers or warriors who Horses in warfare, fight mounted on horseback. Until the 20th century, cavalry were the most mob ...

. ''Decanus'' is equivalent to the rank of the ''dekarchos'' ("commander of ten") in

Greek Greek may refer to: Anything of, from, or related to Greece, a country in Southern Europe: *Greeks, an ethnic group *Greek language, a branch of the Indo-European language family **Proto-Greek language, the assumed last common ancestor of all kno ...

texts. From the 4th century AD the term ''decanus'' became used for palace messengers, particularly those in the service of Roman empresses. ''Decani'' also apparently served as

guard Guard or guards may refer to: Professional occupations * Bodyguard, who protects an individual from personal assault * Crossing guard, who stops traffic so pedestrians can cross the street * Lifeguard, who rescues people from drowning * Prison gu ...

s at gates, and in the 6th century,

John Lydus John the Lydian or John Lydus (; ) ( AD 490 – 565) was a Byzantine administrator and writer. He is considered a key figure in antiquarian studies from the fourth to the sixth century A.D. Although he is a secondary author, his works are signific ...

equates them with the ancient

lictor A lictor (possibly from Latin language, Latin ''ligare'', meaning 'to bind') was a Ancient Rome, Roman civil servant who was an attendant and bodyguard to a Roman magistrate, magistrate who held ''imperium''. Roman records describe lictors as hav ...

s.. In the 899 ''Klētorologion'' of Philotheos, the ''decanus'' (transcribed into Greek as δεκανός, ''dekanos'') was a mid-level functionary, serving under the '' protasekretis''. According to the mid-10th century ''

De Ceremoniis The or (fully ) is the conventional Latin name for a Greek book of ceremonial protocol at the court of the Byzantine emperors in Constantinople. Its Greek title is often cited as ("Explanation of the Order of the Palace"), taken from the work' ...

'' of Emperor

Constantine VII Porphyrogennetos Constantine VII Porphyrogenitus (; 17 May 905 – 9 November 959) was the fourth Byzantine emperor of the Macedonian dynasty, reigning from 6 June 913 to 9 November 959. He was the son of Emperor Leo VI and his fourth wife, Zoe Karbonopsina, and ...

(), a ''decanus'' was "in charge of the imperial papers" when the Byzantine emperor was on campaign. .

Sigillographic Sigillography, also known by its Greek-derived name, sphragistics, is the scholarly discipline that studies the Sealing wax, wax, lead, clay, and other Seal (emblem), seals used to authenticate archive, archival documents. It investigates not o ...

evidence for the Byzantine ''dekanoi'' is relatively rare, although some are depicted in illuminated

manuscript A manuscript (abbreviated MS for singular and MSS for plural) was, traditionally, any document written by hand or typewritten, as opposed to mechanically printed or reproduced in some indirect or automated way. More recently, the term has ...

s, where their appearance varies considerably, in accord with their varying and changing functions. In the

Christian Church In ecclesiology, the Christian Church is what different Christian denominations conceive of as being the true body of Christians or the original institution established by Jesus Christ. "Christian Church" has also been used in academia as a syn ...

, the term came into use in monasteries for heads of groups of ten other monks, for low-ranking subaltern officials of the

Patriarchate of Constantinople The Ecumenical Patriarchate of Constantinople (, ; ; , "Roman Orthodox Patriarchate, Ecumenical Patriarchate of Istanbul") is one of the fifteen to seventeen autocephalous churches that together compose the Eastern Orthodox Church. It is headed ...

, and for the ecclesiastic ''fossores'' ("grave-diggers").

References

Sources

* * Ecclesiastical titles Military ranks of ancient Rome Byzantine palace offices {{italic title