Jacques de Vitry, C. R. S. A., ( c. 1160 / 70 – May 1, 1240 ) was a French canon regular who was a noted theologian and chronicler of his era.

According to the Cedynia website, the " Name of city appears in documents under oldest written records already in the year 972 as Cidini, in 1187 as Zedin and Cedene, in 1240 as Ceden.

The first records of the town date from 1240, when it was sacked by the Mongol hordes of Batu Khan.

The Secret History of the Mongols ( written in Mongolian in 1240 AD ) in Chapter 4, Paragraph 140 records a wrestling match between Buri the Wrestler and Belgutei that took place in Eastern Mongolia on the Year of the Monkey ( 1200 AD ):

Thus it was held by Roland de Dinan, a Breton lord, in 1167 ; Robert de Beaumont, 4th Earl of Leicester before 1204 ; Theodoric the Teuton, a servant of King John, after 1204 ; William Marshal, 2nd Earl of Pembroke, in 1217, and intermittently by the third and fourth Earls up to 1237 ; Simon de Steyland, the King's clerk, around 1237 ; John son of Geoffrey, described as " of the lands of the Bretons ", from 1240 ; Nicholas of Ely, Bishop of Winchester, from about 1272 ; and then by three successive queens: Queen Eleanor, Queen Margaret, and Queen Isabella, from 1280 until 1331.

* Hugh III, lord of Baux, viscount of Marseille ( 1181 – 1240 ), eldest son of Bertrand I.

* Llywelyn the Great, Prince of Aberffraw and Lord of Eryri ( approximate date ; d. 1240 )

In 1240, the title was theoretically inherited by his son Dafydd ap Llywelyn, though he is not known to have used it.

Out of the power struggle in Gwynedd eventually arose one of the greatest of Welsh leaders, Llywelyn ab Iorwerth, also known as Llywelyn Fawr ( the Great ), who was sole ruler of Gwynedd by 1200 and by his death in 1240 was effectively ruler of much of Wales.

Llywelyn the Great (, ), full name Llywelyn ab Iorwerth, ( c. 117211 April 1240 ) was a Prince of Gwynedd in north Wales and eventually de facto ruler over most of Wales.

He maintained his position in Wales until his death in 1240 and was succeeded by his son Dafydd ap Llywelyn.

David Moore gives a different view: When Llywelyn died in 1240 his principatus of Wales rested on shaky foundations.

Ellesmere was ordered to be attacked by King Henry III in 1231, but Llywelyn retained control of the lordship until his death in 1240.

Dafydd ap Llywelyn, prince of Wales from 1240 to 1246, is recorded as having issued an act at Cemaes in 1238.

After the death of Llywelyn in 1282, every further attempt by the bishop of Llanelwy failed, the Cistercian monks of Aberconwy Abbey ( where Llywelyn the Great, Llywelyn's grandfather, had died in 1240 ) insisted that it be allowed to keep the independence which had belonged to it for 29 years, and ripped down any banners related to the Bishopric or to Edward I.

* 1240 Death of Llywelyn ab Iorwerth, prince of Wales ; Dafydd ap Llywelyn accedes to the throne of Gwynedd

In 1240 Llywelyn died and Henry III of England ( who succeeded John ) promptly invaded large areas of his former realm, usurping them from him.

The English viewed it very differently and considered the title to be bestowed by them and with their grace on only Dafydd ap Llywelyn in 1240 and Llywelyn ap Gruffudd in 1267.

Llywelyn ap Iorwerth ( Llywelyn Fawr ) ruled Gwynedd and most of Wales from 1195 to 1240

Llywelyn held it until his death in 1240.

Some sources state that Dafydd ap Llywelyn had been presented with a coronet by Henry III of England on his accession to the throne of Gwynedd in 1240.

c. 1240 – 1300 ) awdl lamenting the capture and imprisonment of Owain ap Gruffudd, where he likens Owain to Rhun: " Who if free, like Rhun the son of Beli, Would not let Lloegria burn his borders ".

c. 1240 – 1300 ) awdl lamenting the capture and imprisonment of Owain ap Gruffudd, where he likens Owain to Rhun: " Who if free, like Rhun the son of Beli, Would not let Lloegria burn his borders ".

Between 1240 and 1270, Dachau was granted market privileges, first by Duke Otto II, and then by his son, Duke Ludwig II der Strenge.

In 1240, Trencavel's son tried to reconquer his old domain but in vain.

* Muiz ud din Bahram ( 1240 – 1242 ), son of Iltutmish

Though Vincent may well have been summoned to Royaumont even before 1240, there is no actual proof that he lived there before the return of Louis IX and his wife from the Holy Land, early in the summer of 1254 ; but it is evident that he must have written his work De Eruditione Filiorum Nobilium ( where he styles himself as " Vincentius Belvacensis, de ordine praedicatorum, qualiscumque lector in monasterio de Regali Monte ") after this date and yet before January 1260, the approximate date of his Tractatus Consolatorius occasioned by the death of the king's son Louis that year.

If he had not had children, his heirs were his eldest sister's sons Jean de Brienne ( b. 1234 ) and Hugh of Brienne ( b. c. 1240 ), as well as his younger sister's son Hugh of Antioch, the future Hugh III of Cyprus ( b. c. 1235 ).

William de Warenne, 5th Earl of Surrey ( died 1240 ), was the son of Hamelin de Warenne ( Plantagenet ) and Isabel, daughter of William de Warenne, 3rd Earl of Surrey.

On Henry of Bar's death in 1240, Matthias tried to retake those lost castles from Theobald II of Bar, the old count's young son, but he failed and a peace was signed in 1245 which lasted several decades.

1240 – November 27, 1289 at Tyre ), son of Philip of Montfort, Lord of Tyre and second wife Maria, Princess of Antioch, without issue

He was succeeded by Hugh of Lusignan-Antioch ( son of his younger aunt Isabella ) as Hugh III of Cyprus, though his heir-general was another first cousin, Hugh of Brienne ( c 1240 – 1296 ), son of Mary of Cyprus, the eldest aunt of the deceased Hugh II.

In 1238 al-Kamil died and was succeeded by his son Al-Adil II, as-Salih's brother ; by 1240 as-Salih had overthrown him and taken control of Egypt.

His widow, Maud, held the Wakefield Manor from 1240 after his death to 1252 when their son John de Warenne, 6th Earl of Surrey ( 1231 – 1304 ) came of age.

Hugh, Count of Brienne and Lecce ( c. 1240 – 9 August 1296 ) was the second surviving son of Count Walter IV of Brienne and Marie de Lusignan of Cyprus.

Later when he became a Sultan in 1240 she went with him to Egypt and delivered their son Khalil who was called al-Malik al-Mansour.

* Nicole or Nichole d ' Aubigny ( d. abt 1240 ); married Roger de Somery, Baron Somery of Dudley Castle ( died 26 August 1273 ), son of Ralph de Somery ( died 1211 ).

The castle was built between roughly 1210 and 1240 as one of the Snowdonian strongholds of the princes of Gwynedd.

Dafydd ruled Gwynedd following his father's death in 1240.

Led by Prince Alexander Nevsky, Novgorodians repelled the invading Swedes in the Battle of the Neva in 1240, as well as the Germanic crusaders in the Battle of the Ice in 1242, breaking their attempts to colonize the Northern Rus '.

The settlement is believed to mark the location of the Battle of the Neva ( July 15, 1240 ), when weak forces led by Prince Alexander Yaroslavich of Novgorod defeated the Swedes here, and prevented them from advancing farther south into Ingria.

After the Mongol Prince Köden took control of the Kokonor region in 1239, in order to investigate the possibility of attacking Song China from the West, he sent his general Doorda Darqan on a reconnaissance mission into Tibet in 1240.

The Brothers of Dobrin were last mentioned when Drohiczyn was captured by Prince Daniel of Kiev in 1240.

* Odo of Montbéliard ( until 1240 ) titular Prince ; ( 1240-1247 ) ruling Prince

The marriage occurred in 1240, and on Gonzalo's death, Prince Alfonso inherited the title Lord of Molina and governed the Lordship for the rest of his life, at first in collaboration with his wife, and then, after her death, alone, just as stipulated in the marriage contract.