History (Pre-20th Century)

Events

Aftermath of Third Servile War (73-71 BCE)
- Wikipedia article
- Rome
- ~6000 dead
- Plutarch's Life of Crassus (MIT)

Acilian Law on the Right to Recovery of Property Officialy Extorted (122 BCE) (Avalon Project)

Nika riots (532)
- Wikipedia article
- Byzantium
- ~30,000 dead
- Excerpt from Procopius's History of the Wars I (Internet Medieval Sourcebook)

German Crusade (1096)
- Wikipedia article
- Rhineland
- ~10,000 dead
- Excerpts from contemporary sources: Albert of Aix and Ekkehard of Aura (Internet Medieval Sourcebook)
- Solomon bar Samson (Internet Medieval Sourcebook)

Constitutions of Clarendon (1164)
- Wikipedia: Constitutions of Clarendon
- Constitutions of Clarendon (Avalon Project)

Assize of Clarendon (1166)
- Wikipedia: Assize of Clarendon
- Assize of Clarendon (Internet Medieval Sourcebook)
- Assize of Clarendon (Avalon Project)

Clifford's Tower (1190)
- Wikipedia article
- York, UK
- ~190 dead
- Excerpt from Ephraim of Bonn (Internet Medieval Sourcebook)

Execution of prisoners after Siege at Acre (1191)
- Wikipedia article
- Israel
- ~2750 dead
- Excerpt from Itinerarium Peregrinorum et Gesta Regis Ricardi (Internet Medieval Sourcebook)

Magna Carta (1215)
- Wikipedia: Magna Carta
- Magna Carta (Avalon Project)

Albigensian Crusade (1209-1229)
- Wikipedia article
- France
- 20,000 to 100,000 dead

Sicilian Vespers (1282)
- Wikipedia article
- Sicily, Italy
- thousands dead

Sacking of Berwick (1296)
- Wikipedia article
- Berwick-upon-Tweed, Scotland
- ~30,000 dead

Sack of Otranto (1480-1481)
- Wikipedia article
- Otranto, Italy
- ~12,000 dead

St. Bartholomew's Day (1572)
- Wikipedia article
- France
- ~70,000 dead
- Excerpt of eyewitness account by De Thou (Internet Medieval Sourcebook)

Sack of Antwerp (1576)
- Wikipedia article
- Netherlands
- ~8000 dead

Sack of Magdeburg (1630-1631)
- ~20,000 dead
- Germany
- Excerpt written by Otto von Guericke, Burgomeister of Magdeburg (Hanover Project)
- Wikipedia article

Irish Rebellion (1641)
- Wikipedia article
- 4000 dead initially, 12,000 including deaths by exposure and other after-effects

Khmelnytsky Uprising (1648-1654)
- tens of thousands dead
- Poland
- Wikipedia article

Slaughter of Praga (1794)
- Poland
- 10,000 to 20,000 dead
- Wikipedia article

Chios Massacre (1822)
- Greek (formerly Ottoman) island of Chios
- 42,000 dead; 50,000 enslaved; 23,000 exiled
- Wikipedia article

 Suffrage (19th Century)
- Speech of Susan B. Anthony (1872) (The History Place)