Medieval Inquisition in the context of "Ad abolendam"

Catharism (/ˈkæθərɪzəm/ KATH-ər-iz-əm; from the Ancient Greek: καθαροί, romanized: katharoí, "the pure ones") was a Christian quasi-dualist and pseudo-Gnostic movement which thrived in northern Italy and southern France between the 12th and 14th centuries.Denounced as a heretical sect by the Catholic Church, its followers were attacked first by the Albigensian Crusade and later by the Medieval Inquisition, which eradicated them by 1350. Thousands were slaughtered, hanged, or burned at the stake.

Followers were known as Cathars or Albigensians, after the French city Albi where the movement first took hold, but referred to themselves as Good Christians. They believed that there were not one, but two Gods—the good God of Heaven and the evil god of this age (2 Corinthians 4:4). According to tradition, Cathars believed that the good God was the God of the New Testament faith and creator of the spiritual realm. Many Cathars identified the evil god as Satan, the master of the physical world, who was the same as the God of the Old Testament. The Cathars believed that human souls were the sexless spirits of angels trapped in the material realm of the evil god. They thought these souls were destined to be reincarnated until they achieved salvation through the "consolamentum", a form of baptism performed when death is imminent. At that moment, they believed they would return to the good God as "Cathar Perfect". Catharism was initially taught by ascetic leaders who set few guidelines, leading some Catharist practices and beliefs to vary by region and over time.

An inquisition was a Catholic judicial procedure in which ecclesiastical judges could initiate, investigate and try cases in their jurisdiction. Popularly the Inquisition became the name for various medieval and reformation-era state-organized tribunals whose aim was to combat heresy, apostasy, blasphemy, witchcraft, and customs considered to be deviant, using this judicial procedure. Violence, isolation, certain torture or the threat of its application, have been used by inquisitions to extract confessions and denunciations. Inquisitions with the aim of combatting religious sedition (e.g. apostasy or heresy) had their start in the 12th-century Kingdom of France, particularly among the Cathars and the Waldensians. The inquisitorial courts from this time until the mid-15th century are together known as the Medieval Inquisition. Other banned groups investigated by medieval inquisitions, which primarily took place in France and Italy, include the Spiritual Franciscans, the Hussites, and the Beguines. Beginning in the 1250s, inquisitors were generally chosen from members of the Dominican Order, replacing the earlier practice of using local clergy as judges.

Inquisitions also expanded to other European countries, resulting in the Spanish Inquisition and the Portuguese Inquisition. The Spanish and Portuguese inquisitions often focused on the New Christians or Conversos (former Jews who converted to Christianity to avoid antisemitic regulations and persecution), the Marranos (people who were forced to abandon Judaism against their will by violence and threats of expulsion), and on the Moriscos (Muslims who had been forced to convert to Catholicism), as a result of suspicions that they had secretly maintained or reverted to their previous religions, as well as the fear of possible rebellions, as had occurred in previous times (such as the First and Second Morisco Rebellions). Spain and Portugal also operated inquisitorial courts not only in Europe, but also throughout their empires: the Goa Inquisition, the Peruvian Inquisition, and the Mexican Inquisition, among others. Inquisitions conducted in the Papal States were known as the Roman Inquisition.

The Roman Inquisition, formally Suprema Congregatio Sanctae Romanae et Universalis Inquisitionis (Latin for 'the Supreme Sacred Congregation of the Roman and Universal Inquisition'), was a system of partisan tribunals developed by the Holy See of the Catholic Church, during the second half of the 16th century, responsible for prosecuting individuals accused of a wide array of crimes according to Catholic law and doctrine, relating to Catholic religious life or alternative religious or secular beliefs. It was established in 1542 by the leader of the Catholic Church, Pope Paul III. In the period after the Medieval Inquisition, it was one of three different manifestations of the wider Catholic Inquisition, the other two being the Spanish Inquisition and Portuguese Inquisition.

The Portuguese Inquisition (Portuguese: Inquisição Portuguesa), officially known as the General Council of the Holy Office of the Inquisition in Portugal, was formally established in Portugal in 1536 at a long-standing request of King John III.

It was one of three different manifestations of the wider Christian Inquisition, along with the Spanish Inquisition and Roman Inquisition, that survived in the period after the Medieval Inquisition. The Goa Inquisition was an extension of the Portuguese Inquisition in colonial-era Portuguese India. The Portuguese Inquisition was terminated in 1821.