* 1256 – Hulagu Khan captures and destroys the Hashshashin stronghold at Alamut in present-day Iran as part of the Mongol offensive on Islamic southwest Asia.

On 11 June 1256, the General Chapter of the Trinitarian Order formally affiliated Louis IX at the monastery of Cerfroid, which had been constructed by Felix of Valois north of Paris.

* 1256 – The Augustinian monastic order is constituted at the Lecceto Monastery when Pope Alexander IV issues a papal bull Licet ecclesiae catholicae.

* 1256 – December 15 – Hulagu Khan captures and destroys the Hashshashin stronghold at Alamut in present-day Iran.

The last Grand Master of the Assassins at Alamut Imam Rukn al-Din Khurshah ( 1255 – 1256 ) was executed by the Hulagu Khan after a devastating siege

Boniface was once more absent from England from October 1254 to November 1256, and spent most of that time in Savoy where he attempted to help his brothers rescue their eldest brother Thomas who was being held captive at Turin.

The Parliament of Scotland met at the abbey in 1256, 1285, 1327, 1366, 1384, 1389 and 1410.

Following his two major ethical works, al-Tusi studied under the patronage of the Ismaili Imam at the Alamut library until it capitualtedto the Mongols in 1256.

After the massacres at Tun in 1256 AD, Hulegu became directly involved in the Mongol campaign to eliminate the Ismaili centres of power.

* September 1, 1256 ( Kōgen 1, 11th day of the 8th month ): Yoritsune's son and successor as Kamakura shogun, Kujō Yoritsugu, also known as Fujiwara Yoritsugu, died at the age of 18 years.

Saltom pit The earliest reference to coal mining in the Whitehaven area is in the time of Prior Langton ( 1256 – 82 ) of St Bees Priory, concerning the coal mines at Arrowthwaite.

The two locomotives, numbers 1256 and 3557, took the carriages away to Swindon railway works at 9. 57pm, and all trains since have been standard gauge.

* September 1, 1256 ( Kōgen 1, 11th day of the 8th month ): Yoritsune's son and successor as Kamakura shogun, Kujō Yoritsugu, also known as Fujiwara Yoritsugu, died at the age of 18 years.

# Maria of Brabant ( 1256, Leuven – January 12, 1321, Murel ), married at Vincennes on August 27, 1274 to King Philip III of France.

# In the ecclesiastical statutes of St Machar's issued in 1256 the rights of the salmon fishing at Palgoueny were given to the deacon of the Cathedral,

He retired with 1256 runs, 1299 RBIs, a. 331 batting average, and 127 home runs which was at the time second only to Roger Connor.

All in all, the first known Swedish military expedition against Novgorod after the events at the Neva took place in 1256, following folkungs ' demise, peace with Norway and conquest of Finland.

Johannes de Sacrobosco or Sacro Bosco ( John of Holywood, c. 1195 – c. 1256 ) was a scholar, monk, and astronomer ( probably English, but possibly Irish or Scottish ) who taught at the University of Paris and wrote the authoritative mediaeval astronomy text Tractatus de Sphaera.

Robert de Burghersh, 1st Baron Burghersh, was born between 1252 and 1256, at Burghersh, in Sussex, England, and died in 1306.

* September 1, 1256 ( Kōgen 1, 11th day of the 8th month ): Yoritsune's son and successor as Kamakura shogun, Kujō Yoritsugu, also known as Fujiwara Yoritsugu, died at the age of 18 years.

It is believed to have existed since at least 1256 and is built in the perpendicular style.

William de Warrene ( 1256 – 1286 ) was killed at a tournament in Croydon pre-deceasing his father.

He signed its charter at his ecclestical estate at Swainston Manor in 1256.

After the death of Frederick II in 1250, the German kingdom was divided between his son Conrad IV ( died 1254 ) and the anti-king, William of Holland ( died 1256 ).

# Katharina ( 1256 – 4 April 1282, Landshut ), married 1279 in Vienna to Otto III, Duke of Bavaria who later ( after her death ) became the disputed King Bela V of Hungary and left no surviving issue.

On the death of William of Kilkenny in 1256 the monks elected him Bishop of Ely, to the annoyance of King Henry III of England and Boniface of Savoy, the Archbishop of Canterbury.

Melis Stoke, a scribe to William's son Floris V of Holland, wrote about William's death that, in battle near Hoogwoud on 28 January 1256, William tried to traverse a frozen lake ( by himself, because he was lost ), but his horse fell through the ice.

Floris ’ s mother ( Elisabeth ) continued to reside in Holland after her husband ’ s death in 1256.

Guy was ransomed in 1256 and the death of Margaret's son John strengthened their position.

After the death of Master Pierre in 1256, Notre-Dame du Gard became a priory.

The year of his death is uncertain, with evidence supporting the years 1234, 1236, 1244, and 1256.

In 1256, Peine was conquered by Albrecht, Duke of Braunschweig-Lüneburg, and after Gunzelin's death in 1260, his sons lost the fief of Peine to the Bishop of Hildesheim.

After the death of King William ( 28 January 1256 ), Konrad played an important role in the election of the new king.

* William II of Holland ( 1228 – 1256 )

* William II, 1228 – 1256, count of Holland, later also king of Germany.

On separate occasions, in return for loans from the treasury of Guelders, the bishop of Utrecht granted the taxation and administration of the Veluwe, and William II --- Count of both Holland and Zeeland, and who was elected anti-king of the Holy Roman Empire ( 1248 – 1256 )--- similarly granted the same rights over Nijmegen ; as neither ruler proved able to repay their debts, these lands became integral parts of Guelders.

* William III of Cagliari ( ruled 1256 – 1258 )

William II of Holland ( February 1228 – 28 January 1256 ) was a Count of Holland and Zeeland ( 1235 – 56 ).

The leader of this dispute, William of Saint-Amour, had published an anti-mendicant pamphlet, De periculis novissimorum temporum ( On the Dangers of the Last Days ) between the fall of 1255 and spring of 1256.

# William ( 1251 – 1256 )

* William II of Holland ( 1228 – 1256 ), also King of Germany

He was the son of Count William II ( 1227 – 1256 ), who was elected King of the Romans of the Holy Roman Empire in 1248, and was slain in 1256 by Frisians when Floris was just two years old.

| width = auto | William II1235 – 1256

William of Kilkenny ( died 21 September 1256 ) was a Lord Chancellor of England and Bishop of Ely.

William died on 21 September 1256, in Spain where he had gone on a diplomatic mission for the king.

A charter of William Longespee, son of the Earl of Salisbury, records that the advowson, with the Manor of Shalford, is given to John, son of Geoffrey Earl of Essex, who died in 1256.

Rochester had its own martyr, William of Perth, and in 1256 Lawrence, Bishop of Rochester travelled to Rome to obtain William's canonisation.

Most of the charges against the friars are familiar from other works such as Jack Upland, the Vae Octuplex or Wyclif's Trialogus, and most are ultimately derived from William of Saint-Amour's De Periculis Novissimorum Temporum ( 1256 ).