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|Ab urbe condita||2052|
|Balinese saka calendar||1220–1221|
|English Regnal year||27 Edw. 1 – 28 Edw. 1|
|Chinese calendar||戊戌年 (Earth Dog)|
3995 or 3935
— to —
己亥年 (Earth Pig)
3996 or 3936
|- Vikram Samvat||1355–1356|
|- Shaka Samvat||1220–1221|
|- Kali Yuga||4399–4400|
|Japanese calendar||Einin 7 / Shōan 1|
|Minguo calendar||613 before ROC|
|Thai solar calendar||1841–1842|
1425 or 1044 or 272
— to —
1426 or 1045 or 273
|Wikimedia Commons has media related to 1299.|
- February 24 – Alauddin Khalji, sultan of Delhi, sends his generals Ulugh Khan and Nusrat Khan to conquer Gujarat.
- May 10 – Kyawswa of Pagan and Crown Prince Theingapati are executed at Myinsaing, by the three brothers of the Myinsaing Kingdom (nominally Kyawswa's viceroys), as traitors for submitting to the Mongol Empire.
- July 27 – Osman I declares his Anatolian beylik (principality) to be independent of the Seljuq Dynasty Sultanate of Rum, originating the Ottoman Empire, with Söğüt as the original capital, which will last until the 1920s.
- A Mongol khan launches a campaign into India with 200,000 men, but Alauddin Khalji, sultan of Delhi, defeats them.
- The Kingdom of Singapura is founded by a fleeing Srivijayan prince (it will last for almost 100 years).
- April – The Scots take Stirling Castle from the English, after a siege.
- April 1 – Kings Towne on the River Hull (Kingston upon Hull) is granted city status, by Royal Charter of King Edward I of England.
- July 31 – Pisa and Genoa agree to a thirty-year truce. Part of the treaty includes the end of the Pisan support to Genoa's enemies, in particular Sinucello della Rocca in Corsica.
- November 1 – Håkon V Magnusson becomes king of Norway.
- December 1 – Battle of Falconaria: Frederick II of Sicily defeats Philip I of Taranto.
- The House of Holland becomes extinct. The County of Holland becomes part of a personal union with the County of Hainaut.
- A serious fire occurs at Westminster Palace.
- Early evidence is uncovered of the king of England borrowing from the Italian merchants. Edward I obtains a loan of 2,000 pollard marks, from agents of the Frescobaldi Firm in London.
- The city of Florence bans the use of Arabic numerals for commerce, allowing only Roman numerals.
- date unknown
- May 10
- May 17 – Daumantas of Pskov, Lithuanian prince (b. c. 1240)
- July 15 – King Eric II of Norway (b. c. 1268)
- August 1 – Conrad de Lichtenberg, Bishop of Strasbourg (b. 1240)
- November 10 – John I, Count of Holland (b. 1284)
- November 13 – Oliver Sutton, Bishop of Lincoln
- December 9 – Bohemond I, Archbishop of Trier
- December 31 – Margaret, Countess of Anjou (b. 1273)
- date unknown
- Cancelleri, J.-A. "Sinucello della Rocca". Dizionario biografico. Retrieved December 20, 2011.
- Ferris, Eleanor (1902). "The Financial Relations of the Knights Templars to the English Crown". American Historical Review. 8 (1).