Ramon Berenguer II, Count of Barcelona is assassinated, most likely by his brother, Berenguer Ramon II.

Ramon Berenguer II the Towhead or Cap de estopes was Count of Barcelona from 1076 until his death. He was the son of Ramon Berenguer I, Count of Barcelona, and Almodis de La Marche. The Chronicle of San Juan de la Pena called him, "… exceeding brave and bold, kind, pleasant, pious, joyful, generous, and of an attractive appearance". Because of the extremely thick hair he had on top of his head, he was known as Cap d'Estop."

Berenguer Ramon II "the Fratricide" was count of Barcelona from 1076 to 1097. He was the son of Ramon Berenguer I and Almodis of La Marche, and initially ruled jointly with his twin brother Ramon Berenguer II.

December 5 is the 339th day of the year in the Gregorian calendar; 26 days remain until the end of the year.