|1205 by topic|
|Political entities - State leaders - Religious leaders|
|Birth and death categories|
|Births – Deaths|
|Establishments and disestablishments categories|
|Establishments – Disestablishments|
|Art and literature|
|1205 in poetry|
|Ab urbe condita||1958|
|Balinese saka calendar||1126–1127|
|English Regnal year||6 Joh. 1 – 7 Joh. 1|
|Chinese calendar||甲子年 (Wood Rat)
3901 or 3841
— to —
乙丑年 (Wood Ox)
3902 or 3842
|- Vikram Samvat||1261–1262|
|- Shaka Samvat||1126–1127|
|- Kali Yuga||4305–4306|
|Japanese calendar||Genkyū 2
|Minguo calendar||707 before ROC
|Thai solar calendar||1747–1748|
1331 or 950 or 178
— to —
1332 or 951 or 179
|Wikimedia Commons has media related to 1205.|
- The general Muhammad al-Inti b. Abi Hafs establishes the Almohad domination over the eastern parts of Ifriqiya, and enters Tripoli.
- Theodore I Laskaris is proclaimed Byzantine Emperor, formally founding the Empire of Nicaea, after repelling the invasions of rivals David Komnenos and Manuel Maurozomes into his domains.
- January 6 – Philip of Swabia becomes King of the Romans.
- April 14 – Battle of Adrianople: The Bulgarians defeat the Latins.
- Anjou is conquered by Philip II of France. Fearing a French invasion of England itself, John of England requires every English male over 12 to enter an association "for the general defence of the realm and the preservation of peace".
- Othon de la Roche founds the Duchy of Athens.
- William of Wrotham, Lord Warden of the Stannaries of England, oversees a reform of English currency. In keeping with other high-ranking bureaucrats of his time and place, this is just one of Wrotham's many offices: he is also Keeper of the King's Ports & Galleys, supervisor of the mints of Canterbury and London, ward of the vacant Diocese of Bath and Wells, an archdeacon of Taunton, a canon of Wells, and will serve the following year as a circuit judge.
- July 15 – Pope Innocent III lays down the principle that Jews are doomed to perpetual servitude, because they had crucified Jesus.
- January 26 - Emperor Lizong of Song (died 1264)
- July 10 - Hōjō Masamura, Japanese shogun (died 1273)
- August - Razia Sultana, only female ruler of Sultanate of Delhi (d. 1240)
- April 1 – King Amalric II of Jerusalem (b. 1145)
- April 5 – Queen Isabella I of Jerusalem (b. 1172)
- May 7 – Ladislaus III of Hungary (b. 1201)
- June 14 – Walter III, Count of Brienne
- July 13 – Hubert Walter, Archbishop of Canterbury
- June – Alexios Aspietes, ruler of Philippopolis
- December – Alexios V Doukas, Byzantine Emperor (executed)
- date unknown
- probable – Baldwin I of Constantinople (b. 1172)
- Picard, Christophe (1997). La mer et les musulmans d'Occident VIIIe-XIIIe siècle. Paris: Presses Universitaires de France.
- King John by Warren. Published by University of California Press in 1961. p. 111
- King John by Warren. Published by University of California Press in 1961. p. 130