* 1204 – The Crusaders of the Fourth Crusade breach the walls of Constantinople and enter the city, which they completely occupy the following day.

* 1204 – Eleanor of Aquitaine ( b. 1122 )

* 1204 – Constantinople falls to the Crusaders of the Fourth Crusade, temporarily ending the Byzantine Empire.

* Michael Angold ( 1997 ), The Byzantine Empire, 1025 – 1204, Longman, 2nd ed., pp. 136 – 70.

* Michael Angold, The Byzantine Empire, 1025 – 1204: A Political History, second edition ( London and New York, 1997 )

Alexios V Doukas, surnamed Mourtzouphlos (, d. December 1205, Constantinople ) was Byzantine Emperor ( 5 February – 12 April 1204 ) during the second and final siege of Constantinople by the participants of the Fourth Crusade.

* Anna Maria of Hungary ( c. 1204 – 1237 ), wife of Tzar Ivan Asen II of Bulgaria

The Byzantine Empire, 1025 – 1204.

* 1263 – King Haakon IV of Norway ( b. 1204 )

* 1204 – Abû ' Uthmân Sa ' îd ibn Hakam al Qurashi, ruler of Minorca ( d. 1282 )

* 1204 – Maimonides, Spanish rabbi and philosopher ( b. 1135 )

Eleanor of Aquitaine () ( 1122 or 1124 – 1 April 1204 ) was one of the wealthiest and most powerful women in Western Europe during the High Middle Ages.

* 1192 – 1200 / 1204: Frederick I ( also count of Zollern as Frederick III )

* 1204 – 1218: Frederick II ( son of, also count of Zollern as Frederick IV )

* The Mishneh Torah ( also known as the Yad HaHazaka for its 14 volumes ; " yad " has a numeric value of 14 ), by Maimonides ( Rambam ; 1135 – 1204 ).

* 1204 – King Philip Augustus of France conquers Rouen.

Maimonides ( 1135 – 1204 CE ) relates that until the Babylonian exile ( 586 BCE ), all Jews composed their own prayers, but thereafter the sages of the Great Assembly composed the main portions of the siddur.

Byzantine empresses: women and power in Byzantium, AD 527 – 1204.

* 1204 – Baldwin IX, Count of Flanders is crowned as the first Emperor of the Latin Empire.

The Charte aux Normands granted by Louis X of France in 1315 ( and later re-confirmed in 1339 ) – like the analogous Magna Carta granted in England in the aftermath of 1204 – guaranteed the liberties and privileges of the province of Normandy.

* 1182 – Minamoto no Yoriie, Japanese shogun ( d. 1204 )

* " Historical Dynamics in a Time of Crisis: Late Byzantium, 1204 – 1453 " ( discussion of social dynamics from the point of view of historical studies )

* Heinrich of Klingen ( 1200 – 1204 )

Inge Baardson ( Norwegian: Inge Bårdsson, Old Norse: Ingi Bárðarson ) ( 1185 – 23 April 1217 ) was king of Norway from 1204 to 1217.

The city of Rouen surrendered to Philip II on 23 June 1204.

* June 6 – King Henry I of Castile ( b. 1204 )

On 24 June 1204, Philip II Augustus of France entered Rouen and annexed Normandy to the French Kingdom.

On June 15, 1204 he married ( as her third husband ) Marie of Montpellier, daughter and heiress of William VIII of Montpellier by Eudocia Comnena.

Henry I of Castile ( 14 April 1204 – 6 June 1217 ) was king of Castile.

In 1204 King John granted the rights for a fair at the feast of All Saints, 1 November, and in 1258 Henry III granted the right for fair on the feast of St John the Baptist, 24 June.

Simon IV de Montfort, Seigneur de Montfort-l ' Amaury, 5th Earl of Leicester ( 1160 – 25 June 1218 ), also known as Simon de Montfort the elder, was a French nobleman who took part in the Fourth Crusade ( 1202 – 1204 ) and was a prominent leader of the Albigensian Crusade.

In 1204 Fulk III regained possession, but on 30 June 1216 King John ordered that Alveston should be seized once again from Fulk III FitzWarin.

The Empire of Trebizond was founded in early April 1204, when Alexios Komnenos and his brother David Komnenos, taking advantage of the preoccupation of the central Byzantine government with the encampment of the soldiers of the Fourth Crusade outside their walls ( June 1203 – mid-April 1204 ), seized the city of Trebizond and the surrounding province of Chaldia with troops provided by their relative, Tamar of Georgia.

Château de Falaise fell to Philip's forces, as well as castles from Mortain to Pontorson while Philip simultaneously besieged Rouen, which capitulated to French forces on 24 June 1204, effectively ending Norman independence.

: Eveline ( Aveline ) de Clare, d. 4 June 1225, m. ( c. 1204 ), Geoffrey IV Fitz Piers ( Fitz Peter ), 1st Earl of Essex.

The origins of what has come to be known as Occam's razor are traceable to the works of earlier philosophers such as John Duns Scotus ( 1265 – 1308 ), Maimonides ( Moses ben-Maimon, 1138 – 1204 ), and even Aristotle ( 384 – 322 BC ) ( Charlesworth 1956 ).

Agnes Maria of Andechs-Merania ( died 1201 ), queen of France, was the daughter of Bertold IV ( died 1204 ), who was Count of Andechs, a castle and territory near Ammersee, Bavaria and from 1183 duke of Merania ( Istria ).

By the 9th century, eunuch singers were well-known ( not least in the choir of Hagia Sophia ), and remained so until the sack of Constantinople by the Western forces of the Fourth Crusade in 1204.

* Frederick IV ( 1204 – 1251 / 1255 ), also Burgrave of Nuremberg ( as Frederick II ) until 1218

* Vasiliev, Alexander ( January 1936 ), " The Foundation of the Empire of Trebizond ( 1204 – 1222 )", Speculum, Vol.

Contemporaries of Melisende who did rule, however, included Urraca of Castile ( 1080 – 1129 ), Empress Matilda ( 1102 – 1169 ), and Eleanor of Aquitaine ( 1122 – 1204 ).

* Agnes ( 1171 – after 1204 ), who was betrothed to Alexius II Comnenus ( 1180 – 1183 ) but married ( 1 ) Andronicus I Comnenus ( 1183 – 1185 ); ( 2 ) Theodore Branas ( 1204 )

Palace House ( not to be confused with the Palace of Beaulieu in Essex ), which overlooks the village from across Beaulieu River, began in 1204 as the gatehouse to Beaulieu Abbey, and has been the ancestral home of a branch of the Montagu family since 1538, when it was bought from the Crown following the Dissolution of the Monasteries by Henry VIII.

The second Karmapa, Karma Pakshi ( 1204 – 1283 ), is often said to be the first person ever recognized and empowered as a tulku ( sprul sku ), a reincarnated lama ( bla ma ).

When the Byzantine Empire broke up ( 1204 ), Acarnania passed to the Despotate of Epirus and in 1480 to the Ottoman Empire.

** Richenza ( 1172 – 1204 ), also called Matilda, married Godfrey, Count of Perche, and Enguerrand III, Lord of Coucy

March 19, 1205 ), Emperor of Byzantium ( 1204 – 1205 ); and two younger brothers: Alexios Laskaris, Latin military leader against the Bulgars who fought with the French against John III Doukas Vatatzes and was imprisoned and blinded, and Isaakios Laskaris.

* Palazzo dell ' Arengo e del Podestà ( 1204 ), seat of the judiciary and civil administrations.

Georgius Pachymeres () ( 1242 – c. 1310 ), a Byzantine Greek historian, philosopher and miscellaneous writer, was born at Nicaea, in Bithynia, where his father had taken refuge after the capture of Constantinople by the Latins in 1204.

1125 – 1186 ), Rambam ( 1135 – 1204 ), Rabbi Eliezer ben Yoel Halevi ( ca 1140 – ca 1225 ), Rashba ( 1235 – 1310 ), Aharon Halevi of Barcelona ( b. ca 1235?