1003

Millennium:	2nd millennium
Centuries:	10th century – 11th century – 12th century
Decades:	970s 980s 990s – 1000s – 1010s 1020s 1030s
Years:	1000 1001 1002 – 1003 – 1004 1005 1006

1003 by topic
Lists of leaders
State leaders
Birth and death categories
Births – Deaths
Establishments and disestablishments categories
Establishments – Disestablishments

Events

January 25 – Werner, Margrave of the Nordmark succeeds Lothair.
February 9 – Boleslaus III of Bohemia is restored to authority with armed support from Bolesław I the Brave of Poland. In the following months Boleslav's brothers Jaromir and Oldrich flee to Germany and place themselves under the protection of Henry II, Holy Roman Emperor, while Boleslaus III of Bohemia orders massacre of his leading nobles at Vyšehrad.
May 4 – Herman III, Duke of Swabia succeeds Herman II.
Vladivoj of Bohemia succeeds Boleslaus III
Boleslaus IV succeeds Vladivoj of Bohemia.
Bolesław I of Poland annexes parts of present-day Slovakia (possible date).
Wilfred succeeds Abbot Oliva as count of Berga.
Sweyn I of Denmark begins his first invasion of England.
Humbert I becomes the first count of Savoy.
King Robert II of France invades Burgundy, but fails.
Robert II of France marries Constance of Arles.
Boleslaus I of Poland becomes duke of Bohemia and Moravia.
Stephen I of Hungary invades Transylvania and organises the Diocese of Transylvania (possible date).
Deutz Abbey is founded at Deutz by Heribert of Cologne.

Pope Zacharias of Alexandria succeeds Pope Philotheos of Alexandria as Patriarch of Alexandria.

The construction of Brihadeeswarar temple, Thanjavur, Tamil Nadu, India, starts. Chola Dynasty, Early Medieval period.

Advisa, Countess of Auxerre, (approximate date; d.after 1063), married Count Renaud I of Nevers
Conrad II, Duke of Carinthia (d. 1039)
Edward the Confessor (approximate date) (d. 1066)
Emperor Jingzong of Western Xia
Frederick, Duke of Lower Lorraine (approximate date; d. 1065
Herleva, mother of William I of England (d. c. 1050)
Ibn Zaydún, Arabic poet (d. 1071)
Musharrif al-Daula, Buyid amir of Iraq (d. 1025)