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|Ab urbe condita||2053|
|Balinese saka calendar||1221–1222|
|English Regnal year||28 Edw. 1 – 29 Edw. 1|
|Chinese calendar||己亥年 (Earth Pig)|
3996 or 3936
— to —
庚子年 (Metal Rat)
3997 or 3937
|- Vikram Samvat||1356–1357|
|- Shaka Samvat||1221–1222|
|- Kali Yuga||4400–4401|
|Japanese calendar||Shōan 2|
|Minguo calendar||612 before ROC|
|Thai solar calendar||1842–1843|
1426 or 1045 or 273
— to —
1427 or 1046 or 274
|Wikimedia Commons has media related to 1300.|
- February 22 – The Jubilee of Pope Boniface VIII is celebrated. It is at this celebration that Giovanni Villani decides to write his universal history of Florence, the Cronica.
- June 15 – The city of Bilbao receives a royal foundation charter.
- Money from Florence, Italy becomes the first international currency.
- Philip IV of France begins his attempt to annex Flanders.
- Wenceslas II of Bohemia becomes King of Poland.
- A census in Imperial China finds that it has roughly 60 million inhabitants.
- The Tuareg establish a state centered on Agadez.
- Amsterdam is officially declared a city.
- Jacob ben Machir is appointed dean of the medical school at Montpellier, France.
- Aztec culture starts in Mesoamerica (approximate date).
- The Dulcinian sect begins when Gherardo Segarelli, founder of the Apostolic Brethren, is burned at the stake in Parma, during a brutal repression of the Apostolics.
- June 1 – Thomas of Brotherton, 1st Earl of Norfolk, son of Edward I of England (d. 1338)
- September 27 – Adolf, Count Palatine of the Rhine (d. 1327)
- date unknown
- Dionigi di Borgo San Sepolcro, Italian Augustinian monk (d. 1342)
- Geoffroi de Charny, French knight and chivalric writer (d. 1356)
- Richard FitzRalph, Archbishop of Armagh (d. 1360)
- Taddeo Gaddi, Italian painter and architect (d. 1366)
- Ibn Kathir, Syrian Islamic scholar (d. 1373)
- Laurence Minot, English poet (d. 1352)
- John of Winterthur, Swiss historian
- February 19 – Munio of Zamora, Spanish General of the Dominican Order
- July 18 – Gerard Segarelli, Italian founder of the Apostolic Brethren (burned at stake)
- September – Edmund, 2nd Earl of Cornwall (approximate date; b. 1249)
- December – Jean de Montfort-Castres, Count of Squillace
- date unknown
- Guido Cavalcanti, Italian poet (b. 1250)
- Tsar Chaka, Mongol ruler of Bulgaria
- Berengaria of Castile, Lady of Guadalajara, Spanish ruler (b. 1253)
- Tran Hung Dao, Vietnamese general
- Jacob van Maerlant, Flemish poet
- Jeanne de Montfort de Chambéon, Swiss ruler (b. 1250)
- William of Nangis, French chronicler
- A royal descent [of the family of Sharpe]; with other pedigrees and memorials [With] Additions and corrections. 1875. pp. 2–.
- Steven Mueller (2007). The Wittelsbach Dynasty. Waldmann Press. ISBN 978-0-9702576-3-5.
- Anne Rudloff Stanton (2001). The Queen Mary Psalter: A Study of Affect and Audience. American Philosophical Society. pp. 217–. ISBN 978-0-87169-916-9.
- Axelrod, Alan (2013). Mercenaries: A Guide to Private Armies and Private Military Companies. CQ Press. p. 174. ISBN 9781483364674.