April 5: 991 Damascus earthquake in Syria: According to historian George Elmacin (13th century), the earthquake caused the fall of 1,000 houses in Damascus itself, and many people were trapped in their ruins and died. The village of Beglabec was reportedly engulfed, due to the earthquake.[1]
Spring: Byzantine Emperor Basil II begins a campaign against the Bulgarians.
June 17 – 18: The royal council of Saint-Basle de Verzy is marked by opposition between the bishops and the monks. Gerbert d'Aurillac is elected as the deposed Arnulf's successor as the Archbishop of Reims, to the anger of Pope John XV, who had no involvement in the decision.
Count Odo I of Blois, who captured Melun, is driven out of the city by the coalition of King Hugh Capet, Count Fulk III of Anjou and Richard I of Normandy; Odo is defeated in Orsay by Bouchard I of Vendôme, a faithful vassal of Capet charged with guarding Melun.
Stavoren is sacked in Viking raids on the ports of Frisia and the mouths of the Rhine.
The Dagome iudex, a document which enumerates the possessions of Mieszko I, is written and entrusted to Pope John XV, who places the Polish territories under papal protection.
