Ancient Rome In modern historiography, ancient Rome is the Roman people, Roman civilisation from the founding of Rome, founding of the Italian city of Rome in the 8th century BC to the Fall of the Western Roman Empire, collapse of the Western Roman Em ...

, a decury (

Latin Latin ( or ) is a classical language belonging to the Italic languages, Italic branch of the Indo-European languages. Latin was originally spoken by the Latins (Italic tribe), Latins in Latium (now known as Lazio), the lower Tiber area aroun ...

''decuria'', plural: ''decuriae'') was a group of ten people, ranged under one chief, or commander, called a '' decurio''. In Roman cavalry a '' turma'' was divided into three decuries. According to legend,

Romulus Romulus (, ) was the legendary founder and first king of Rome. Various traditions attribute the establishment of many of Rome's oldest legal, political, religious, and social institutions to Romulus and his contemporaries. Although many of th ...

divided the whole Roman people into three tribes, over each of which he appointed a

tribune Tribune () was the title of various elected officials in ancient Rome. The two most important were the Tribune of the Plebs, tribunes of the plebs and the military tribunes. For most of Roman history, a college of ten tribunes of the plebs ac ...

. Each tribe he subdivided into ten centuries, with

centurion In the Roman army during classical antiquity, a centurion (; , . ; , or ), was a commander, nominally of a century (), a military unit originally consisting of 100 legionaries. The size of the century changed over time; from the 1st century BC ...

s at their heads, and each century he subdivided further into ten decuries, over each of which a decurio commanded. In the

interregnum An interregnum (plural interregna or interregnums) is a period of revolutionary breach of legal continuity, discontinuity or "gap" in a government, organization, or social order. Archetypally, it was the period of time between the reign of one m ...

after the death of Romulus the

Roman Senate The Roman Senate () was the highest and constituting assembly of ancient Rome and its aristocracy. With different powers throughout its existence it lasted from the first days of the city of Rome (traditionally founded in 753 BC) as the Sena ...

, comprised at that time of 100 men, arranged itself into ten decuries, and each ''decuria'' governed Rome for five days. In a rotating manner, each man within a ''decuria'' reigned for 12 hours, six by day and six by night, as

interrex The interrex (plural interreges) was an extraordinary magistrate during the Roman Kingdom and Republic. Initially, the interrex was appointed after the death of the king of Rome until the election of his successor, hence its name—a ruler "betwee ...

. The ''decuriae'' continued to rotate the government amongst themselves for a year until the election and accession of

Numa Pompilius Numa Pompilius (; 753–672 BC; reigned 715–672 BC) was the Roman mythology, legendary second king of Rome, succeeding Romulus after a one-year interregnum. He was of Sabine origin, and many of Rome's most important religious and political ins ...

. ''Decuria'' was also a Roman unit of measurement applied to ''

civitas In Ancient Rome, the Latin term (; plural ), according to Cicero in the time of the late Roman Republic, was the social body of the , or citizens, united by Roman law, law (). It is the law that binds them together, giving them responsibilitie ...

'' of native peoples. It had been mentioned by

Pliny the Elder Gaius Plinius Secundus (AD 23/24 79), known in English as Pliny the Elder ( ), was a Roman Empire, Roman author, Natural history, naturalist, and naval and army commander of the early Roman Empire, and a friend of the Roman emperor, emperor Vesp ...

at 70 AD in his work, ''Natural History''.

Etymology

From *''dek''- 'ten' plus *''-ur-yo-'', a Common Italic formation, judging from the related Umbrian ', ''; and compare Oscan .Poultney, J.W. "Bronze Tables of Iguvium" 1959 p. 302 https://archive.org/details/bronzetablesofig00poul/page/n19/mode/2up

Notes

References

* * Society of ancient Rome Military of ancient Rome {{AncientRome-stub