Forced conversion
- Al-Andalus
- Alhambra Decree
- Arian Christians
- Assolna
- Avitus of Clermont
- Aztec
- Baltic Finns
- Baltic Sea
- Baltics
- Balts
- Bardez
- Battle of White Mountain
- Bohemian Revolt
- Buddhism
- Byzantine Empire
- Capitulatio de partibus Saxoniae
- Catholic (term)
- Charlemagne
- Charles II of Naples
- Charles V, Holy Roman Emperor
- Chilperic I
- Chin people
- Christianisation of Goa
- Christianity
- Christians
- Classical antiquity
- Codex Theodosianus
- Coercion
- Confucianism
- Constantine the Great and Christianity
- Constantinian shift
- Converso
- Counter-Reformation
- Crown of Aragon
- Crown of Castile
- Crypto-Christianity
- Crypto-Hinduism
- Crypto-Islam
- Crypto-Judaism
- Crypto-paganism
- Cuncolim
- Dragonnades
- Early Christianity
- Edict of Fontainebleau
- Edict of Nantes
- Edict of Thessalonica
- Elizabeth of Russia
- European colonization of the Americas
- Expulsion of Jews and Muslims from Portugal
- Ferdinand II, Holy Roman Emperor
- Gaul
- Germanic paganism
- Gratian
- Gregory of Tours
- Habsburg monarchy
- Heresy
- Hindu
- Hinduism
- History of Jewish conversion to Christianity
- Huguenots
- Iberian Peninsula
- Inca
- Islam
- Ivan the Terrible
- Judaism
- Khanate of Kazan
- Kievan Rus'
- King of the Franks
- Kingdom of Bohemia
- Late Antiquity
- List of states in the Holy Roman Empire
- Livonian Brothers of the Sword
- Livonian Crusade
- Louis XIV
- Marrano
- Massacre of Verden
- Max Müller
- Mesoamerica
- Middle Ages
- Morisco
- Morocco
- Mudéjar
- Muslims
- Myanmar
- New Christian
- Nicene Christianity
- Northern Crusades
- Old Prussian
- Ottoman Empire
- Peace of Augsburg
- Persecution of Christians in the Roman Empire
- Persecution of pagans in the late Roman Empire
- Pope Innocent III
- Portugal
- Portuguese Inquisition
- Protestantism in France
- Prussian Crusade
- Rhineland massacres
- Roman Empire
- Roman law
- Saxon Wars
- Saxons
- Sephardi
- Serfdom
- South America
- Spanish Inquisition
- State (polity)
- Taoism
- Tetrarchy
- Teutonic Order
- Theodosius I
- Theodosius II
- Three Jewels and Three Roots
- Trinitarianism
- Utraquism
- Valentinian II
- Valentinian III
- Vandals
- Vladimir the Great
- Wendish Crusade
- West Slavs
- Worms massacre (1096)
- Zoroastrianism