The Code of Justinian, also known as the Corpus Juris Civilis, was a comprehensive collection of Roman law commissioned by Emperor Justinian I and published in 529 CE. It became the basis of Byzantine law and later influenced legal systems across Europe.

In the early Middle Ages, customary law, based on long-standing traditions and practices, played a dominant role in shaping legal decisions. Written codes and other formal sources of law gained prominence later.

Trial by Battle, also known as judicial combat, was a method of resolving legal disputes in medieval Europe. Two parties would engage in a physical fight, and the victor was deemed to be in the right.

Manorial courts, presided over by the lord of the manor, were responsible for administering justice within the manor. They handled a wide range of legal matters, including disputes between tenants, petty crimes, and inheritance issues.

Trial by Compurgation involved an individual swearing an oath of innocence and having a group of compurgators, typically neighbors or peers, swear that they believed the oath was true.

Royal courts, presided over by the king or his representatives, were responsible for administering justice in major cases, such as treason, murder, and serious crimes that affected the entire kingdom.

Trial by Ordeal involved an individual undergoing a physical test, such as walking on hot coals or holding a hot iron, to prove their innocence. If they emerged unharmed, they were considered innocent.

During the High Middle Ages, written codes, such as the Magna Carta and the Justinian Code, gained prominence as sources of law. These codes provided a more structured and comprehensive framework for legal decision-making.

Trial by Jury involved a group of impartial individuals, known as jurors, hearing evidence and determining the guilt or innocence of an accused individual.

Ecclesiastical courts, presided over by church officials, were responsible for administering justice in matters of faith, such as heresy, blasphemy, and moral offenses.

Trial by Compurgation involved an individual presenting witnesses who could testify to their good character and reputation, supporting their claim of innocence.

During the Late Middle Ages, royal decrees, issued by the king or his representatives, became a significant source of law. These decrees often addressed specific issues or provided guidance on legal matters.

Trial by Peers involved a group of individuals from the same social class as the accused hearing evidence and determining their guilt or innocence.

Merchant courts, established in trading towns and cities, were responsible for administering justice in matters of trade, such as disputes over contracts, debts, and tariffs.

Trial by Ordeal involved an individual undergoing a physical test, such as plunging their hand into boiling water or carrying a hot iron for a certain distance, to prove their innocence.