Canon law is a set of ordinances and regulations made by ecclesiastical authority for the government of a Christian organization or church and its members. It is the internal ecclesiastical law, or operational policy, governing the Catholic Church, the Eastern Orthodox and Oriental Orthodox churches, and the individual national churches within the Anglican Communion. The way that such church law is legislated, interpreted and at times adjudicated varies widely among these four bodies of churches. In all three traditions, a canon was originally a rule adopted by a church council; these canons formed the foundation of canon law.
Jurisprudence is the philosophy and theory of law. It is concerned primarily with what the law is and what it ought to be. That includes questions of how persons and social relations are understood in legal terms, and of the values in and of law. Work that is counted as jurisprudence is mostly philosophical, but it includes work that also belongs to other disciplines, such as sociology, history, politics and economics.
The following outline is provided as an overview of and introduction to law:
Roman law is the legal system of ancient Rome, including the legal developments spanning over a thousand years of jurisprudence, from the Twelve Tables, to the Corpus Juris Civilis ordered by Eastern Roman emperor Justinian I. Roman law forms the basic framework for civil law, the most widely used legal system today, and the terms are sometimes used synonymously. The historical importance of Roman law is reflected by the continued use of Latin legal terminology in many legal systems influenced by it, including common law.
The Corpus JurisCivilis is the modern name for a collection of fundamental works in jurisprudence, issued from 529 to 534 by order of Byzantine Emperor Justinian I. It is also sometimes referred to metonymically after one of its parts, the Code of Justinian.
The judiciary is the system of courts that adjudicates legal disputes/disagreements and interprets, defends, and applies the law in legal cases.
Religious law includes ethical and moral codes taught by religious traditions. Different religious systems hold sacred law in a greater or lesser degree of importance to their belief systems, with some being explicitly antinomian whereas others are nomistic or "legalistic" in nature. In particular, religions such as Judaism, Islam and the Baháʼí Faith teach the need for revealed positive law for both state and society, whereas other religions such as Christianity generally reject the idea that this is necessary or desirable and instead emphasise the eternal moral precepts of divine law over the civil, ceremonial or judicial aspects, which may have been annulled as in theologies of grace over law.
Legal history or the history of law is the study of how law has evolved and why it has changed. Legal history is closely connected to the development of civilisations and operates in the wider context of social history. Certain jurists and historians of legal process have seen legal history as the recording of the evolution of laws and the technical explanation of how these laws have evolved with the view of better understanding the origins of various legal concepts; some consider legal history a branch of intellectual history. Twentieth-century historians viewed legal history in a more contextualised manner – more in line with the thinking of social historians. They have looked at legal institutions as complex systems of rules, players and symbols and have seen these elements interact with society to change, adapt, resist or promote certain aspects of civil society. Such legal historians have tended to analyse case histories from the parameters of social-science inquiry, using statistical methods, analysing class distinctions among litigants, petitioners and other players in various legal processes. By analyzing case outcomes, transaction costs, and numbers of settled cases, they have begun an analysis of legal institutions, practices, procedures and briefs that gives a more complex picture of law and society than the study of jurisprudence, case law and civil codes can achieve.
Civil law is a legal system originating in Italy and France and adopted in much of the world. The civil law system is intellectualized within the framework of Roman law and French civil law, and with core principles codified into a referable system, which serves as the primary source of law. The civil law system is often contrasted with the common law system, which originated in medieval England. Whereas the civil law takes the form of legal codes, the law in common law systems historically came from uncodified case law that arose as a result of judicial decisions, recognising prior court decisions as legally binding precedent.
Irnerius, sometimes referred to as lucerna juris, was an Italian jurist, and founder of the School of Glossators and thus of the tradition of Medieval Roman Law.
The Decretum Gratiani, also known as the Concordia discordantium canonum or Concordantia discordantium canonum or simply as the Decretum, is a collection of canon law compiled and written in the 12th century as a legal textbook by the jurist known as Gratian. It forms the first part of the collection of six legal texts, which together became known as the Corpus Juris Canonici. It was used as the main source of law by canonists of the Roman Catholic Church until the Decretals, promulgated by Pope Gregory IX in 1234, obtained legal force, after which it was the cornerstone of the Corpus Juris Canonici, in force until 1917.
Byzantine law was essentially a continuation of Roman law with increased Orthodox Christian and Hellenistic influence. Most sources define Byzantine law as the Roman legal traditions starting after the reign of Justinian I in the 6th century and ending with the Fall of Constantinople in the 15th century. Although future Byzantine codes and constitutions derived largely from Justinian's Corpus Juris Civilis, their main objectives were idealistic and ceremonial rather than practical. Following Hellenistic and Near-Eastern political systems, legislations were tools to idealize and display the sacred role and responsibility of the emperor as the holy monarch chosen by God and the incarnation of law "nómos émpsychos", thus having philosophical and religious purposes that idealized perfect Byzantine kingship.
The canon law of the Catholic Church is "how the Church organizes and governs herself". It is the system of laws and ecclesiastical legal principles made and enforced by the hierarchical authorities of the Catholic Church to regulate its external organization and government and to order and direct the activities of Catholics toward the mission of the Church. It was the first modern Western legal system and is the oldest continuously functioning legal system in the West, while the unique traditions of Eastern Catholic canon law govern the 23 Eastern Catholic particular churches sui iuris.
Western law comprises the legal traditions of Western culture, with roots in Roman law and canon law. As Western culture shares a Graeco-Roman Classical and Renaissance cultural influence, so do its legal systems.
Roman-Dutch law is an uncodified, scholarship-driven, and judge-made legal system based on Roman law as applied in the Netherlands in the 17th and 18th centuries. As such, it is a variety of the European continental civil law or ius commune. While Roman-Dutch law was superseded by Napoleonic codal law in the Netherlands proper as early as the beginning of the 19th century, the legal practices and principles of the Roman-Dutch system are still applied actively and passively by the courts in countries that were part of the Dutch colonial empire, or countries which are influenced by former Dutch colonies: Guyana, South Africa, Sri Lanka, Indonesia, Suriname, and the formerly Indonesian-occupied East Timor. It also heavily influenced Scots law. It also had some minor impact on the laws of the American state of New York, especially in introducing the office of Prosecutor (schout-fiscaal).
Ius or Jus in ancient Rome was a right to which a citizen (civis) was entitled by virtue of his citizenship (civitas). The iura were specified by laws, so ius sometimes meant law. As one went to the law courts to sue for one's rights, ius also meant justice and the place where justice was sought.
Law is a set of rules that are created and are enforceable by social or governmental institutions to regulate behavior, with its precise definition a matter of longstanding debate. It has been variously described as a science and as the art of justice. State-enforced laws can be made by a group legislature or by a single legislator, resulting in statutes; by the executive through decrees and regulations; or established by judges through precedent, usually in common law jurisdictions. Private individuals may create legally binding contracts, including arbitration agreements that adopt alternative ways of resolving disputes to standard court litigation. The creation of laws themselves may be influenced by a constitution, written or tacit, and the rights encoded therein. The law shapes politics, economics, history and society in various ways and also serves as a mediator of relations between people.
David John Ibbetson is a British legal academic. He was Regius Professor of Civil Law at the University of Cambridge from 2000 to 2022, and President of Clare Hall from 2013 to 2020. From 2009 until 2012, he served as the chairman of the Faculty of Law, University of Cambridge. He was General Editor of the Cambridge Law Journal between 2003 and 2009.
Medieval Roman law is the continuation and development of ancient Roman law that developed in the European Late Middle Ages. Based on the ancient text of Roman law, Corpus iuris civilis, it added many new concepts, and formed the basis of the later civil law systems that prevail in the vast majority of countries.
The jurisprudence of Catholic canon law is the complex of legal theory, traditions, and interpretative principles of Catholic canon law. In the Latin Church, the jurisprudence of canon law was founded by Gratian in the 1140s with his Decretum. In the Eastern Catholic canon law of the Eastern Catholic Churches, Photios holds a place similar to that of Gratian for the West.
