* 1284 – The Republic of Pisa is defeated in the Battle of Meloria by the Republic of Genoa, thus losing its naval dominance in the Mediterranean.

# Alexander, Prince of Scotland ( 21 January 1264 Jedburgh – 28 January 1284 Lindores Abbey ); buried in Dunfermline Abbey

* Alfonso X of Castile-( 1252 – 1284 )

* 1284 – Edward II of England ( d. 1327 )

The Cantigas de Santa Maria (" Canticles of Holy Mary ";, ) are 420 poems with musical notation, written in Galician-Portuguese during the reign of Alfonso X El Sabio ( 1221 – 1284 ) and often attributed to him.

* Studies on the " Cantigas de Santa Maria ": Art, Music, and Poetry: Proceedings of the International Symposium on the " Cantigas de Santa Maria " of Alfonso X, el Sabio ( 1221 – 1284 ) in Commemoration of Its 700th Anniversary Year – 1981.

Jalāl ad-Dīn Muhammad Balkhī (), also known as Jalāl ad-Dīn Muhammad Rūmī (), and more popularly in the English-speaking world simply as Rumi ( 30 September 1207 – 17 December 1273 ), was a 13th-century after whose death in 1284 Rumi's younger and only surviving son, Sultan Walad ( died 1312 ), favorably known as author of the mystical Maṭnawī Rabābnāma, or the Book of the Rabab was installed as grand master of the order.

( 2004 ) Struggle for Mastery: The Penguin History of Britain 1066 – 1284.

( 2004 ) The Struggle for Mastery: The Penguin History of Britain 1066 – 1284.

* 1284 – The Statute of Rhuddlan incorporates the Principality of Wales into England.

* 1284 – King Hugh III of Cyprus ( b. 1235 )

* Simone Martini ( 1284 – 1344 ), Italian painter

* 1273 – Alphonso, Earl of Chester, son of Edward I of England ( d. 1284 )

* 1221 – King Alfonso X of Castile ( d. 1284 )

* 1327 – Edward II of England ( b. 1284 )

( 2004 ) Struggle for Mastery: The Penguin History of Britain 1066 – 1284.

* Simone Martini, Italian painter ( 1284 – c. 1344 )

* Edward II ( 1284 – 1327?

* November 10 – John I, Count of Holland ( b. 1284 )

* November 23 – King Alfonso X of Castile ( d. 1284 )

* 1284 – King Charles II of Naples is captured in a naval battle off Naples by Roger of Lauria, admiral to King Peter III of Aragon.

* 1284 – The Italian city-state of Genoa defeats its rival Pisa in the naval Battle of Meloria, ending Pisa's marine power and hastening the city's decline in power.

* 1284 – The Statute of Rhuddlan is created, formally incorporating Wales into England in the entity England and Wales.

* 1284 – Stefan Dragutin, king of Serbia, receives Belgrade, Syrmia, and other territories from Hungary when his son marries the king of Hungary's cousin.

Jean de Meun translated in 1284 the treatise De Re Militari of Vegetius into French as Le livre de Végèce de l ' art de chevalerie.

It is the oldest college of the University, having been founded in 1284 by Hugo de Balsham, Bishop of Ely.

* 1284 — Peterhouse, Cambridge founded by Hugo de Balsham, the Bishop of Ely.

de: 1284

* 1284 – Construction on the Cathédrale Saint-Pierre de Beauvais is interrupted by a partial collapse of the choir ; the event unnerves French masons working in the Gothic style.

* 1284 – Peterhouse, the oldest college at the University of Cambridge, is founded by Hugo de Balsham as The Scholars of the Bishop of Ely.

* 8 terms: Gregory de Rokesley ( 1274 – 1280, 1284 )

In 1284, with the Cistercian Abbey of Marzan, Philip IV established Villeneuve de Berg, and by the treaty of 10 July 1305 Philip IV of France obliged the bishops of Vivarais to admit the sovereignty of the Kings of France over all their temporal domain.

His elder brother, Ferdinand de la Cerda, died in November 1275, and in 1282 Sancho assembled a coalition of nobles to declare for him against Ferdinand's son Alfonso, then took control of the kingdom when Alfonso X died in 1284.

Nicola Pisano ( also called Niccolò Pisano, Nicola de Apulia or Nicola Pisanus ; c. 1220 / 1225 – c. 1284 ) was an Italian sculptor whose work is noted for its classical Roman sculptural style.

Begun in 1247, under Bishop William of Grès ( Guillaume de Grès, Guillaume de Grez ), an extra 5 m were added to the height, to make it the tallest cathedral in Europe: the work was interrupted in 1284 by the collapse of the vaulting of the choir, a disaster that produced a temporary failure of nerve among the masons working in Gothic style.

The suffix Mandeville was first recorded in 1284 when the manor was listed as being in the hands of the powerful Norman de Mandeville family.

After studies of law in Orléans and perhaps Bologna, de Rémi became bailli of Clermont in the county of Beauvaisis ( 1279 ), then seneschal of Poitou ( 1284 ) and the Saintonge ( 1287 ).

Hugh III of Cyprus ( 1235 – 24 March 1284 ), born Hughues de Poitiers ,< ref >

During the second of these periods it was organised as a feudal lordship, with the following Lords of Jerba: 1284 – 1305 Roger I, 1305 – 1307 and 1307 – 1310 Roger II ( twice ), 1310 Charles, 1310 Francis-Roger III ; there were also royal governors, partially overlapping with the lordship terms: c. 1305 – 1308 Simon de Montolieu, 1308 – 1315 Raymond Montaner.

* William de Moravia, 1st Earl of Sutherland ( d. 1284 ) ( The de Moravia line were the chiefs of Clan Sutherland and senior family blood line of the Clan Murray )

It was a de facto industry standard for many years, and was finally standardized as IEEE 1284 in the late 1990s.

* Alfonso X of Castile ( 1252 – 1284 ): Bertran de Lamanon, Bonifaci Calvo, Guiraut Riquier, Folquet de Lund, Arnaut Plages, Bertran Carbonel

It changed hands many times during its violent history, for example, it was burned by the O ' Dempseys in 1284, rebuilt by de Vesey and given to the king, burned along with its town by the Scots army in 1315, burned by the O ' Moores in 1346, captured by the O ' Dempseys in 1422 and then lost to the Earl of Ormond in 1452, used by Silken Thomas Fitzgerald as a refuge in 1535, mortgaged to Sir Maurice Fitzgerald in 1556, and leased to Robert Bath in 1618.