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Calendar year
Year 1231 (MCCXXXI) was a common year starting on Wednesday of the Julian calendar. Emperor Frederick II promulgates the Constitutions of Melfi (Liber
1231
Category of property under U.S. Internal Revenue Code
1231 Property is a category of property defined in section 1231 of the U.S. Internal Revenue Code. 1231 property includes depreciable property and real
1231_property
Country in West Asia
Ghurid dynasty (1011–1215) Seljuk Empire (1037–1194) Anushtegin dynasty (1077–1231) Eldiguzids (1135/36-1225) Kart dynasty (1244–1381) Ilkhanate (1256–1335)
Iran
Medieval Muslim empire (c. 1077–1231)
large parts of present-day Central Asia, Afghanistan, and Iran from 1077 to 1231; first as vassals of the Seljuk Empire and the Qara Khitai (Western Liao
Khwarazmian_Empire
Portuguese Catholic saint (1195–1231)
Anthony of Lisbon (born Fernando Martins de Bulhões; 15 August 1195 – 13 June 1231) was a Portuguese Catholic priest and member of the Order of Friars Minor
Anthony_of_Padua
1960s Soviet surface combatant/submarine hybrid
Project 1231 was a hybrid surface combatant and submarine developed in the Soviet Union in the 1960s. It was known as "Dolphin" (Russian: Дельфин) and
Project_1231
and Ethnic Slurs in the English-speaking World. Routledge. ISBN 978-0-7656-1231-1. Archived from the original on 25 February 2024. Retrieved 12 April 2015
List_of_ethnic_slurs
Supermassive-black-hole-containing quasar in the constellation Crater
RX J1131−1231 is a distant, supermassive-black-hole-containing quasar located about 6 billion light years from Earth in the constellation Crater. In 2014
RX_J1131−1231
American multinational technology company
for up to $3 billion – report. RTÉ. https://www.rte.ie/news/business/2025/1231/1551009-nvidia-in-talks-to-buy-israels-ai21-labs/ Archived January 4, 2026
Nvidia
Hungarian princess and Christian saint
Szent Erzsébet, Slovak: Svätá Alžbeta Uhorská; 7 July 1207 – 17 November 1231), also known as Elisabeth of Thuringia, was a princess of the Kingdom of
Elizabeth_of_Hungary
Islamic religious law
University of Pennsylvania Law Review (Submitted manuscript). 136 (4): 1231–61. doi:10.2307/3312162. JSTOR 3312162. S2CID 153149243. Archived from the
Sharia
1205 his daughter Beatrice II 1192 7 May 1231 1205 to 7 May 1231 her sister Otto II 1180 7 May 1234 21 June 1208 to 7 May 1231 her husband and co-ruler
List_of_counts_of_Burgundy
Chemical compound of hydrogen and oxygen
119–143. arXiv:1411.7412. Bibcode:2015AsBio..15..119L. doi:10.1089/ast.2014.1231. ISSN 1531-1074. PMC 4323125. PMID 25629240. Pepin RO (July 1991). "On the
Water
American politician and lawyer (1925–1968)
Our Vietnam: The War 1954-1975. New York: Simon and Schuster. ISBN 0-7432-1231-2. Neff, James (2015). Vendetta: Bobby Kennedy Versus Jimmy Hoffa. Excerpt
Robert_F._Kennedy
1231–1271 Mongol Yuan conquests
A series of campaigns were conducted between 1231 and 1270 by the Mongol Empire against the Korean kingdom of Goryeo. The last campaign concluded with
Mongol_invasions_of_Korea
Western music created during the Middle Ages
Bonel was in the court of Alfonso II of Aragon. Folquet de Marselha (c. 1150–1231) became a Cistercian monk and the bishop of Toulouse. Arnaut de Mareuil was
Medieval_music
Small domesticated carnivorous mammal
(2010). "How cats lap: Water uptake by Felis catus". Science. 330 (6008): 1231–1234. Bibcode:2010Sci...330.1231R. doi:10.1126/science.1195421. PMID 21071630
Cat
Ancient Jewish biblical manuscripts
"Illuminating Genetic Mysteries of the Dead Sea Scrolls". Cell. 181 (6): 1218–1231.e27. doi:10.1016/j.cell.2020.04.046. PMID 32492404. S2CID 219300081. "DNA
Dead_Sea_Scrolls
King of Germany from 1257 to 1272
has suggested an earlier period of construction for the castle. In March 1231, he married Isabel Marshal, the wealthy widow of the Earl of Gloucester,
Richard_of_Cornwall
1225–1231 war
The Nicaean–Seljuk war of 1225–1231 was a border war fought between the Empire of Nicaea and the Sultanate of Rum, where the Nicaean Emperor John III Vatatzes
Nicaean–Seljuk war (1225–1231)
Nicaean–Seljuk_war_(1225–1231)
Rus prince (1203–1269)
1271) was Prince of Belz (1207–1269), Prince of Berestia (1231–1269), and Prince of Volhynia (1231–1269). He was the son of Roman the Great and Anna-Euphrosyne
Vasylko_Romanovych
Last shah of the Khwarazmian Empire from 1220 to 1231
Anushteginids, 1097–1231 Государство Хорезмшахов-Ануштегинидов: 1097–1231 [A History of the Khorezmian State under the Anushteginids, 1097–1231]. Page: 152 Buniyatov
Jalal_al-Din_Mangburni
English noble (1190–1231)
Marshal, 2nd Earl of Pembroke (French: Guillaume le Maréchal) (1190 – 6 April 1231) was a medieval English nobleman and one of the sureties of Magna Carta.
William Marshal, 2nd Earl of Pembroke
William_Marshal,_2nd_Earl_of_Pembroke
Greek papyrus fragment
Papyrus Oxyrhynchus 1231 (P. Oxy. 1231 or P. Oxy. X 1231) is a papyrus discovered at Oxyrhynchus in Egypt, first published in 1914 by Bernard Pyne Grenfell
Papyrus_Oxyrhynchus_1231
also agostaro, was a gold coin minted in the Kingdom of Sicily beginning in 1231. It was issued by Frederick II, Holy Roman Emperor (from 1220) and King of
Augustalis
II, Margrave of Baden-Hachberg (before 1231 – c. 1297/1298) was the ruling Margrave of Baden-Hachberg from 1231 to 1289. Henry II was the eldest son of
Henry_II_of_Baden-Hachberg
Emperor of Japan from 1198 to 1210
(土御門天皇, Tsuchimikado-tennō; 3 January 1196[citation needed] – 6 November 1231) was the 83rd emperor of Japan, according to the traditional order of succession
Emperor_Tsuchimikado
Decade
Decades 1250s BC 1240s BC 1230s BC 1220s BC 1210s BC Years 1239 BC 1238 BC 1237 BC 1236 BC 1235 BC 1234 BC 1233 BC 1232 BC 1231 BC 1230 BC Categories v t e
1230s_BC
Historic hotel in San Francisco
The Hotel Whitcomb is a historic hotel, located at 1231 Market Street in San Francisco. The building was completed in 1912 as San Francisco's temporary
Hotel_Whitcomb
Carbonaceous background asteroid
1231 Auricula (prov. designation: 1931 TE2) is a carbonaceous background asteroid from the central regions of the asteroid belt, approximately 20 kilometers
1231_Auricula
Polish clergyman and bishop
Roman Catholic Archdiocese of Kraków. He became ordained in 1231. He was appointed bishop in 1231. He died in 1242. https://www.catholic-hierarchy.org/bishop/bzambra
Wisław_Zabawa
Public collegiate university in England
share many common features and are often jointly referred to as Oxbridge. In 1231, 22 years after its founding, the university was recognised with a royal
University_of_Cambridge
Architectural style of Medieval France
style was developed in the major reconstruction of the Abbey of Saint-Denis (1231) The first major church built in the new style was Amiens Cathedral (1220–1271)
Rayonnant
between 1231 and 1246, following the Mongol conquest of the Khwarazmian Empire (1221) and the death of the last Khwarazmshah, Jalal al-Din (1231). It was
Khwarazmian army between 1231 and 1246
Khwarazmian_army_between_1231_and_1246
Bishop of Lausanne and saint
taught, until 1231, in Cologne at the cathedral school. He became the Bishop of Lausanne in 1231 and was enthroned in his new see in March 1231 after receiving
Boniface_of_Brussels
Muslim rulers in Bengal (1204–1231)
briefly reasserted their independence, they surrendered to the Mamluks in 1231, who replaced them with a series of regional governors. The Khalji dynasty
Khalji_dynasty_(Bengal)
State highway in Texas, United States
along FM 1231 and FM 948. The extension to Spur was officially designated on August 29, 1990 to Spur, cancelling FM 1231 and FM 948. FM 1231 was designated
Texas_State_Highway_208
German World War II submarine
German submarine U-1231 was a Type IXC/40 U-boat built for Nazi Germany's Kriegsmarine during World War II. German Type IXC/40 submarines were slightly
German_submarine_U-1231
January 12, 1931. p. 1 – via Newspapers.com. Sobel 1978, p. 1231. Sobel 1978, pp. 1231–1232. "Martin Luther Davey". National Governors Association. Archived
List_of_governors_of_Ohio
Business analytics service by Microsoft
ago (2011-07-11) Stable release(s) [±] Windows October 2026 Update (2.159.1231) / November 2, 2026; 12 days ago (2026-11-02) Android 2.2.260616 (Build 21311025)
Microsoft_Power_BI
World War II battle, 1944–1945
Macarthur and Dwight D. Eisenhower, Trafford Publishing, ISBN 978-1-4907-1231-4 Parker, Danny S. (1999), The Battle of the Bulge, The German View: Perspectives
Battle_of_the_Bulge
deletion as part of La DOTD's Road Transfer Program. Louisiana Highway 1231 (LA 1231) consists of two road segments with a total length of 5.97 miles (9
List of state highways in Louisiana (1200–1299)
List_of_state_highways_in_Louisiana_(1200–1299)
Archbishop of Canterbury from 1229 to 1231
Richard le Grant was Archbishop of Canterbury from 1229 to 1231. Grant was a native of Nazeing, Essex and had a brother and sister whom he provided for
Richard_le_Grant
12th-century Count of Charolais and Lord of Bourbon
John of Burgundy (Jean de Bourgogne; 1231 – 29 September 1268) was a Count of Charolais and Lord of Bourbon. He was the younger son of Duke Hugh IV of
John_of_Burgundy_(1231–1268)
German noblewoman
Richardis of Bavaria (1173 – 20 September 1231) was a German noblewoman. She was a daughter of Count Palatine Otto I of Bavaria, who later became the first
Richardis_of_Bavaria
Junior King of Denmark from 1215 to 1231
Valdemar (III) the Young (Danish: Valdemar den Unge) (c. 1209 – 28 November 1231) was a junior King of Denmark from 1215 until his death. Valdemar was the
Valdemar_the_Young
Emperor of Japan from 1232 to 1242
Emperor Shijō (四条天皇, Shijō-tennō) (17 March 1231 – 10 February 1242) was the 87th emperor of Japan, according to the traditional order of succession. His
Emperor_Shijō
The following is a list of events in poetry that occurred in 1231. This list includes births and deaths. Máeleoin Bódur Ó Maolconaire becomes Ollamh Síl
1231_in_poetry
Heritage electric railway line in BC, Canada
The car shown (1207) was privately owned. By 2018 both tram cars (1207 and 1231) have been donated and moved to the Fraser Valley Heritage Railway in Cloverdale
Vancouver Downtown Historic Railway
Vancouver_Downtown_Historic_Railway
Norwegian chess grandmaster (born 1990)
1225". The Week in Chess. Crowther, Mark (11 June 2018). "The Week in Chess 1231". The Week in Chess. Crowther, Mark (1 August 2018). "51st Biel Chess Festival
Magnus_Carlsen
Duke of Merania
June 1248), a member of the House of Andechs, was Count of Burgundy from 1231 and the last duke of Merania (numbered Otto II) from 1234 until his death
Otto_III_of_Burgundy
Duke of Bavaria (1206–1253)
called the Illustrious (German: der Erlauchte), was the Duke of Bavaria from 1231 and Count Palatine of the Rhine from 1228. He was the son of Louis I and
Otto_II_of_Bavaria
Determination of flash guide numbers for electronic flash equipment ISO/R 1231:1970 Seat belt assemblies for motorists [Withdrawn without replacement] ISO
List_of_ISO_standards_1–1999
Árpád ruler (c. 1210–1234)
since 1224, and also Prince of Galicia, between 1227 and 1230, and between 1231 and 1234, centered in Halych. Andrew was the youngest (third) son of King
Andrew of Hungary, Prince of Galicia
Andrew_of_Hungary,_Prince_of_Galicia
Sultan of Bengal (1230–1231)
বলকা খলজি, Persian: ملک بلکا خلجی), was the governor of Bengal during 1230–1231 under Delhi Sultan Shamsuddin Iltutmish. Balka was the son of Ali Sher Khalji
Balka_Khalji
German nobleman and throne claimant (c. 1204 – 1247)
Heinrich Raspe; c. 1204 – 16 February 1247) was the Landgrave of Thuringia from 1231 until 1239 and again from 1241 until his death. In 1246, with the support
Henry_Raspe
Revolution in Iran from 1978 to 1979
1029–1236 Shabankara 1030–1355 Seljuk Empire 1037–1194 Khwarazmian dynasty 1077–1231 Nizari Ismaili state 1090–1257 Kingdom of Hormuz 11th century–1622 Eldiguzids
Iranian_Revolution
RNLI Lifeboat station in Orkney, Scotland
operates a Severn-class All-weather lifeboat, 17-13 Margaret Foster (ON 1231), on station since 1998. In the 1960s, the RNLI ordered two 70-foot-long
Kirkwall_Lifeboat_Station
French nobleman and constable (1196–1231)
William II (1196 – 3 September 1231) was the lord of Dampierre from 1216 until his death. He was the son of Guy II, constable of Champagne, and Mathilde
William_II_of_Dampierre
Member of the Normon House of Hauteville
Elvira of Sicily (died in 1231) was a member of the House of Hauteville who claimed the throne of the Kingdom of Sicily. She is known by an exceptional
Elvira_of_Sicily
Iranian religion founded by Zoroaster
Ghurid dynasty (1011–1215) Seljuk Empire (1037–1194) Anushtegin dynasty (1077–1231) Eldiguzids (1135/36-1225) Kart dynasty (1244–1381) Ilkhanate (1256–1335)
Zoroastrianism
Head of the Catholic Church from 1227 to 1241
heresy throughout the whole of Germany. Gregory's bull Parens scientiarum of 1231, after the University of Paris strike of 1229, resolved differences between
Pope_Gregory_IX
Political ideology promoting free-market capitalism
Joshua (2014). "Encyclopedia of Critical Psychology". Neoliberalism. pp. 1231–1237. doi:10.1007/978-1-4614-5583-7_390. ISBN 978-1-4614-5582-0. Morningstar
Neoliberalism
Landgravine of Thuringia from 1228 to 1231
Elisabeth of Brandenburg (c. 1206 – 1231) a member of the House of Ascania. She was a Margravine of Brandenburg by birth and by marriage Landgravine of
Elisabeth of Brandenburg, Landgravine of Thuringia
Elisabeth_of_Brandenburg,_Landgravine_of_Thuringia
Worst famine in Japanese history
period. The famine is considered to have begun in 1229/1230 and lasted until 1231/1232. It was named after the Kangi era (1229–1232), during the reign of Emperor
Kanki_famine
3847/1538-3881/ac511d. S2CID 239024522. Burt, Jennifer A.; et al. (2021). "TOI-1231 b: A Temperate, Neptune-sized Planet Transiting the Nearby M3 Dwarf NLTT
List of exoplanets discovered in 2021
List_of_exoplanets_discovered_in_2021
Largest pyramid in the Giza Necropolis, Egypt
was lost in the passages. The Arab polymath Abd al-Latif al-Baghdadi (1163–1231) studied the pyramid with great care, and in his Account of Egypt, he praises
Great_Pyramid_of_Giza
Private university in New Haven, Connecticut, US
1727–1795. Chapel Hill: University of North Carolina Press. ISBN 978-0-8078-1231-0. Tucker, Louis Leonard (2008) [1962]. Puritan Protagonist: President Thomas
Yale_University
Chivalric order based in Utrecht
Utrecht) is a chivalric order based in Utrecht, Netherlands. It originated in 1231 as a division of the order of Teutonic Knights. During the Protestant Reformation
Bailiwick_of_Utrecht
Topics referred to by the same term
Main states of the Iranian Intermezzo (821–1055) Khwarazmian Empire (1077–1231) Ilkhanid Empire (1256–1335) Timurid Empire (1370–1507) Safavid Empire (1501–1736)
Persian Empire (disambiguation)
Persian_Empire_(disambiguation)
Third Islamic caliphate
Crusading Period from al-Kamil fi'l-Ta'rikh. Part 3: The Years 589–629/1193–1231: The Ayyubids after Saladin and the Mongol Menace. Routledge. p. 124.
Abbasid_Caliphate
Junior queen of Denmark from 1229 to 1231
Eleanor of Portugal (Portuguese: Leonor [liuˈnoɾ]; c. 1211 – 28 August 1231) was a Portuguese infanta, the only daughter of Afonso II of Portugal and Urraca
Eleanor of Portugal, Queen of Denmark
Eleanor_of_Portugal,_Queen_of_Denmark
High Duchess consort of Poland
of Andechs, was Duchess of Silesia from 1201 and of Greater Poland from 1231 as well as High Duchess consort of Poland from 1232 until 1238. She was canonized
Hedwig_of_Silesia
Grandmaster of the Knights Hospitallers
(died 1231 at Acre), also known as Bertrand of Thercy, was the fifteenth Grand Master of the Knights Hospitaller, serving between 1228 and 1230 or 1231. He
Bertrand_de_Thessy
October – Henry returns to England. Devotional work Ancrene Wisse written. 1231 Spring – Henry fights a campaign against Llywelyn the Great in Wales. June
1230s_in_England
for the blended group of Section 1231 "Gains and Losses" of the U.S. tax code. According to the code, a section 1231 gain is: Any recognized gain on the
Hotchpot
Curved bony eminence of the ulna; forms the pointed part of the elbow
the top of each bone. Details Identifiers Latin olecranon MeSH D056740 TA98 A02.4.06.002 TA2 1231 FMA 39795 Anatomical terms of bone [edit on Wikidata]
Olecranon
King of Denmark from 1202 to 1241
Young was accidentally shot while hunting at Refsnæs in North Jutland in 1231. Queen Dagmar died in childbirth in 1212. Old folk ballads say that on her
Valdemar_II_of_Denmark
English baron
Roger Mortimer, 1st Baron Mortimer of Wigmore (c. 1231 – 27 October 1282), of Wigmore Castle in Herefordshire, was a marcher lord who was a loyal ally
Roger Mortimer, 1st Baron Mortimer of Wigmore
Roger_Mortimer,_1st_Baron_Mortimer_of_Wigmore
Medieval dynasty
Olaf the Black, s. 1237, son of Godred, half-brother of Reginald Godred, d. 1231, son of Reginald Harald, d. 1248, son of Olaf Reginald, d. 1249, son of Olaf
Crovan_dynasty
Abrahamic monotheistic religion
Catholic Church (Updated 2nd ed.). Libreria Editrice Vaticana. 2019. Paragraphs 1231, 1233, 1250, 1252. Catechism of the Catholic Church (Updated 2nd ed.). Libreria
Christianity
King of Aragon from 1213 to 1276
Barcelona, and Lord of Montpellier from 1213 to 1276; King of Majorca from 1231 to 1276; and King of Valencia from 1238 to 1276. His long reign of 62 years
James_I_of_Aragon
1077–1260 Persianate Sunni Muslim dynasty of Turkic mamluk origin
Central Asia, Afghanistan and Iran in the approximate period of 1077 to 1231, first as vassals of the Seljuks and the Qara Khitai (Western Liao), and
Anushtegin_dynasty
English nobleman
Pembroke and Lord Marshal of England upon his brother's death on 6 April 1231. Richard was the son of William Marshal and his wife Countess Isabel, meaning
Richard Marshal, 3rd Earl of Pembroke
Richard_Marshal,_3rd_Earl_of_Pembroke
Śvetāmbara Jain temple in Gujarat
Kumbhariya, Banaskantha district in Gujarat, India. Constructed from 1062 to 1231 CE during the reign of the Chaulukya dynasty, they are noted for their elaborate
Kumbharia_Jain_temples
card B300 GPU accelerator Sep 11, 2025 2× GB110 —N/a 18944:592 :24:592:0 (148) 1665 2032 HBM3E 8192 288 2000 8000 1231.8 76.99 1.2029 10.3 1400 SXM card
List of Nvidia graphics processing units
List_of_Nvidia_graphics_processing_units
Affiliated colleges and institutions to the National University, Bangladesh
NESARABAD 1230 BANGABANDHU SHEIKH MUJIBUR RAHMAN COLLEGE PEROJPUR Non Govt. 131952 PEROJPUR 1231 BAITHA KATA COLLEGE PEROJPUR Non Govt. 102890 PEROJPUR
List of affiliated colleges and institutions to the National University, Bangladesh
List_of_affiliated_colleges_and_institutions_to_the_National_University,_Bangladesh
Catholic appointments from 1227 to 1239
Pope Gregory IX (r. 1227–1241) created sixteen cardinals in five consistories that he held throughout his pontificate. This included three future successors
Cardinals created by Gregory IX
Cardinals_created_by_Gregory_IX
Empire in Eurasia (1206–1368)
Gregory G. (Spring 2010). "European Captives and Craftsmen Among the Mongols, 1231–1255". The Historian. 72 (1): 122–150. doi:10.1111/j.1540-6563.2009.00259
Mongol_Empire
Erectile female sexual organ
pp. 32–33; Archer & Lloyd 2002, pp. 85–88 Foldès & Buisson 2009, pp. 1223–1231; Acton 2012, p. 145; Carroll 2013, p. 103 Pappas, Stephanie (9 April 2012)
Clitoris
2005 United States Supreme Court case
1231(b)(2)(E)(iv) permits a non-citizen to be deported to a country without the advance consent of that country's government. Title 8 U. S. C. §1231(b)(2)
Jama v. Immigration & Customs Enforcement
Jama_v._Immigration_&_Customs_Enforcement
Fantasy drama television series
2019 (2019-12-20) Following Geralt of Rivia's battle with a kikimora in 1231, he enters the town of Blaviken and meets Renfri, a cursed princess-turned-bandit
The_Witcher_(TV_series)
Central nervous system stimulant
2012). "Toxicity of amphetamines: an update". Arch. Toxicol. 86 (8): 1167–1231. Bibcode:2012ArTox..86.1167C. doi:10.1007/s00204-012-0815-5. PMID 22392347
Methamphetamine
Species of insect
species from China". ZooKeys (1231). Pensoft Publishers: 45–67. Bibcode:2025ZooK.1231...45W. doi:10.3897/zookeys.1231.141287. ISSN 1313-2970. PMC 11915013
Pycnoscelus_indicus
British politician (1912–1998)
Soviet Union (Prime Minister's Visit), Hansard, 2 April 1987 vol 113 cc1217–1231. Foreign Affairs, Hansard, 7 April 1987 vol 114 cc178–254. Heffer 1998, p
Enoch_Powell
List of rulers of Indian state of Manipur
(1150–1163 AD) Iwanthaba (1163–1195 AD) Thawanthaba (1195–1231 AD) Chingthang Lanthaba (1231–1242 AD) Thingbai Shelhongba (1242–1247 AD) Puranthaba (–1263
List of kings of the Ningthouja dynasty
List_of_kings_of_the_Ningthouja_dynasty
Mongol general under Genghis Khan and Ögedei Khan
Ögedei in 1229. After a humiliating defeat by the resurgent Jin in 1230–1231, Ögedei personally led the main Mongol army against the Jin (in Central China)
Subutai
13th-century English nobleman and military commander
John de Warenne, 6th Earl of Surrey (1231 – 27 September 1304) was a prominent English nobleman and military commander during the reigns of Henry III of
John de Warenne, 6th Earl of Surrey
John_de_Warenne,_6th_Earl_of_Surrey
Count of Flanders (1224–1251)
William III (1224 – 6 June 1251) was the lord of Dampierre from 1231 and count of Flanders from 1247 until his death. He was the son of William II of Dampierre
William_II_of_Flanders
American director, screenwriter, and producer (born 1964)
Horrible and Other Horrible Stories (tpb, 136 pages, 2019, ISBN 1-5067-1231-2) X-Men: Astonishing X-Men vol. 3 (with John Cassaday, 2004–2008) collected
Joss_Whedon
travel, tourism, insurance
1231
1231
1231
1231
1231
1231
1231
1231
1231
travel, tourism, insurance