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Legislative activities

Justinian achieved lasting fame through his judicial reforms, particularly through the complete revision of all Roman law, something that had not previously been attempted. The total of Justinian's legislation is known today as the Corpus juris civilis. It consists of the Codex Justinianeus, the Digesta or Pandectae, the Institutiones, and the Novellae.

Early in his reign, Justinian had appointed the quaestor Tribonian to oversee this task. The first draft of the Codex Justinianeus, a codification of imperial constitutions from the 2nd century onward, was issued on 7 April 529. (The final version appeared in 534.) It was followed by the Digesta (or Pandectae), a compilation of older legal texts, in 533, and by the Institutiones, a textbook explaining the principles of law. The Novellae, a collection of new laws issued during Justinian's reign, supplements the Corpus. As opposed to the rest of the corpus, the Novellae appeared in Greek, the common language of the Eastern Empire.

The Corpus forms the basis of Latin jurisprudence (including ecclesiastical Canon Law) and, for historians, provides a valuable insight into the concerns and activities of the later Roman Empire. As a collection it gathers together the many sources in which the leges (laws) and the other rules were expressed or published: proper laws, senatorial consults (senatusconsulta), imperial decrees, case law, and jurists' opinions and interpretations (responsa prudentium).Tribonian's code ensured the survival of Roman law. It formed the basis of later Byzantine law, as expressed in the Basilika of Basil I and Leo VI the Wise. The only western province where the Justinianic code was introduced was Italy (after the conquest by the so-called Pragmatic Sanction of 554), from where it was to pass to Western Europe in the 12th century and become the basis of much Continental European law code, which was eventually spread by European empires to the Americas and beyond in the Age of Discovery. It eventually passed to Eastern Europe where it appeared in Slavic editions, and it also passed on to Russia. It remains influential to this day.

He passed laws to protect prostitutes from exploitation and women from being forced into prostitution. Rapists were treated severely. Further, by his policies: women charged with major crimes should be guarded by other women to prevent sexual abuse; if a woman was widowed, her dowry should be returned; and a husband could not take on a major debt without his wife giving her consent twice.

Family legislation also revealed a greater concern for the interests of children. This was particularly so with respect to children born out of wedlock. The law under Justinian also reveals a striking interest in child neglect issues. Justinian protected the rights of children whose parents remarried and produced more offspring, or who simply separated and abandoned their offspring, forcing them to beg.

Justinian discontinued the regular appointment of Consuls in 541.

In Constantinople, under Justinian, hospitals were built and free medical care provided to the many poor residents of the city. In addition, public baths were free for all residents and 20 state bakeries provided free bread to those who needed it. According to one study, “The empire’s social welfare programs ensured that no one went hungry.”