Digest (Roman law) in the context of "Codex Justinianus"

The Institutes (Latin: Institutiones) is a component of the Corpus Juris Civilis, the 6th-century codification of Roman law ordered by the Byzantine emperor Justinian I. It is largely based upon the Institutes of Gaius, a Roman jurist of the second century A.D. The other parts of the Corpus Juris Civilis are the Digest, the Codex Justinianus, and the Novellae Constitutiones ("New Constitutions" or "Novels").

The Novellae Constitutiones ("new constitutions"; Ancient Greek: Νεαραὶ διατάξεις, romanized: Nearaì diatáxeis), or Justinian's Novels, are now considered one of the four major units of Roman law initiated by Roman emperor Justinian I in the course of his long reign (AD 527–565). The other three pieces are: the Codex Justinianus, the Digest, and the Institutes. Justinian's quaestor Tribonian was primarily responsible for compiling these last three. Together, the four parts are known as the Corpus Juris Civilis. Whereas the Code, Digest, and Institutes were designed by Justinian as coherent works, the Novels are diverse laws enacted after 534 (when he promulgated the second edition of the Code) that never were officially compiled during his reign.

The Code of Justinian (Latin: Codex Justinianus, Justinianeus or Justiniani) is one part of the Corpus Juris Civilis, the codification of Roman law ordered early in the 6th century AD by Justinian I, who was Eastern Roman emperor in Constantinople. Two other units, the Digest and the Institutes, were created during his reign. The fourth part, the Novellae Constitutiones (New Constitutions, or Novels), was compiled unofficially after his death but is now also thought of as part of the Corpus Juris Civilis.

Inheritance law in ancient Rome was the Roman law that governed the inheritance of property. This law was governed by the civil law (ius civile) of the Twelve Tables and the laws passed by the Roman assemblies, which tended to be very strict, and law of the praetor (ius honorarium, i.e. case law), which was often more flexible. The resulting system was extremely complicated and was one of the central concerns of the whole legal system. Discussion of the laws of inheritance take up eleven of the fifty books in the Digest. 60-70% of all Roman litigation was concerned with inheritance.

In the case of intestacy, Roman inheritance law had no concept of primogeniture and treated male and female children equally. However, in most cases intestacy was avoided by means of a will. Roman law recognised very broad freedom of testation, but wills had to strictly follow correct formulae and phrases in order to be valid. The will had to name an heir. In addition to this, it could name a legal guardian (tutor) for underage children, manumit slaves, and leave legacies to third parties. Over time a separate system of fideicommissa ("trusts"), which allowed greater flexibility, developed alongside the system of wills.

Tribonian (Greek: Τριβωνιανός [trivonia'nos], c. 485? – 542) was a jurist and advisor of the Eastern Roman Empire (Byzantine). During the reign of the Emperor Justinian I, he supervised the revision of the empire's legal code. He has been described as one of the wisest collaborators of Justinian.

Tribonian was a Greek from Cyme, who studied law in Constantinople, where he became the most renowned legal scholar of his day. He was a close friend of Emperor Justinian, who appointed him to head the commission that compiled the Codex Justinianus and the Digest. Justinian also appointed Tribonian to high offices in the imperial administration, such as magister officiorum and quaestor sacri palatii, but at the beginning of the Nika riots he was forced to dismiss him on charges made by his enemies. Tribonian died in 542 of a disease, perhaps the plague.

Ulpian (/ˈʌlpiən/; Latin: Gnaeus Domitius Annius Ulpianus; c. 170 – 223 or 228) was a Roman jurist born in Tyre in Roman Syria (modern Lebanon). He moved to Rome and rose to become considered one of the great legal authorities of his time. He was one of the five jurists upon whom decisions were to be based according to the Law of Citations of Valentinian III, and supplied the Justinian Digest about a third of its contents.

In Roman law, rei vindicatio (from Latin 'claim of the subject') was a legal action by which the plaintiff demands that the defendant return a thing that belongs to the plaintiff. It may be used only when the plaintiff owns the thing, and the defendant has wrongly claimed or assumed possession of the same thing, and is currently impeding the plaintiff's possession of the thing.

The plaintiff could also institute an actio furti (a personal action) to punish the defendant. If the thing could not be recovered, the plaintiff could claim damages from the defendant with the aid of the condictio furtiva (a personal action). With the aid of the actio legis Aquiliae (a personal action), the plaintiff could claim damages from the defendant.