1221 1222 1223 1224 1225 1226 1227 1228 1229 1230
Contents: political eventsexploration, colonization medicine religion |
The Treaty of San Germano in July ends hostilities between Pope Gregory IX and Friedrich II, who is absolved from excommunication after promising to respect the papal territory and to allow freedom of election to the Sicilian clergy.
León's Alfonso IX dies childless September 24 after a 42-year reign. León accepts Ferdinand III of Castile as sovereign and he unites the two kingdoms (see 1157).
The Nicaean emperor John III Vatatzes gains support from the Bulgarian czar Ivan Asen II and defeats the despot Theodore Ducas in battle at Klokotnitsa in Bulgaria (see 1225; 1235).
Bohemia's Ottakar I dies December 15 at age 75 (approximate) after a 33-year reign in which he has won autonomy from the German king and hereditary rights for the house of Premysl. He is succeeded by his son, who will rule until 1253 as Wenceslas I.
Berlin is founded on the site of former Slavic settlements (see Hohenzollerns, 1411).
Leprosy arrives in England with returning crusaders who have accompanied Friedrich II to the Holy Land.
The Teutonic Knights under the leadership of their grand master Hermann von Salza begin a long campaign to Christianize Prussians in the Baltic area (see politics, 1229; 1239).
1221 1222 1223 1224 1225 1226 1227 1228 1229 1230
Mathematics
Hispanus Petrus (a.k.a. Pope Johannes XXI) [b. c. 1205, d. c. 1277] writes Tractatus logicae, subsequently known as Summulae logicales. It becomes the most widely used book on logic until the end of the 18th century, going through almost 200 editions. See also 1122 Communication; 1620 Communication.
| Millennium: | 2nd millennium |
|---|---|
| Centuries: | 12th century – 13th century – 14th century |
| Decades: | 1200s 1210s 1220s – 1230s – 1240s 1250s 1260s |
| Years: | 1227 1228 1229 – 1230 – 1231 1232 1233 |
| 1230 by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishments and disestablishments categories | |
| Establishments – Disestablishments | |
| Art and literature | |
| 1230 in poetry | |
| Gregorian calendar | 1230 MCCXXX |
| Ab urbe condita | 1983 |
| Armenian calendar | 679 ԹՎ ՈՀԹ |
| Assyrian calendar | 5980 |
| Bahá'í calendar | -614–-613 |
| Bengali calendar | 637 |
| Berber calendar | 2180 |
| English Regnal year | 14 Hen. 3 – 15 Hen. 3 |
| Buddhist calendar | 1774 |
| Burmese calendar | 592 |
| Byzantine calendar | 6738–6739 |
| Chinese calendar | 己丑年十二月十五日 (3866/3926-12-15) — to —
庚寅年十一月廿六日(3867/3927-11-26) |
| Coptic calendar | 946–947 |
| Ethiopian calendar | 1222–1223 |
| Hebrew calendar | 4990–4991 |
| Hindu calendars | |
| - Vikram Samvat | 1286–1287 |
| - Shaka Samvat | 1152–1153 |
| - Kali Yuga | 4331–4332 |
| Holocene calendar | 11230 |
| Iranian calendar | 608–609 |
| Islamic calendar | 627–628 |
| Japanese calendar | |
| Julian calendar | 1230 MCCXXX |
| Korean calendar | 3563 |
| Minguo calendar | 682 before ROC 民前682年 |
| Thai solar calendar | 1773 |
| Wikimedia Commons has media related to: 1230 |
Year 1230 (MCCXXX) was a common year starting on Tuesday (link will display the full calendar) of the Julian calendar.
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