1230

1221 1222 1223 1224 1225 1226 1227 1228 1229 1230

political events

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.

exploration, colonization

Berlin is founded on the site of former Slavic settlements (see Hohenzollerns, 1411).

medicine

Leprosy arrives in England with returning crusaders who have accompanied Friedrich II to the Holy Land.

religion

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.

This article does not cite any references or sources. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (November 2009)

Years: 1227 1228 1229 – 1230 – 1231 1232 1233

Decades: 1200s 1210s 1220s – 1230s – 1240s 1250s 1260s

Centuries: 12th century – 13th century – 14th century

1230 by topic

Politics

State leaders – Sovereign states

Birth and death categories

Births – Deaths

Establishments and disestablishments categories

Establishments – Disestablishments v • d • e

Art and literature

1230 in poetry v • d • e

1230 in other calendars

Gregorian calendar	1230 MCCXXX
Ab urbe condita	1983
Armenian calendar	679 ԹՎ ՈՀԹ
Bahá'í calendar	-614 – -613
Berber calendar	2180
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	1285 – 1286
- Shaka Samvat	1152 – 1153
- Kali Yuga	4331 – 4332
Holocene calendar	11230
Iranian calendar	608 – 609
Islamic calendar	627 – 628
Japanese calendar
Korean calendar	3563
Thai solar calendar	1773
v • d • e

Events

• March 9 – Bulgarian tsar Ivan Asen II defeats Theodore of Epirus near the village of Klokotnitsa.
• September 24 – The Kingdom of Leon unites with the Kingdom of Castile under Ferdinand III.
• The Teutonic Knights are invited into Prussia to forcibly convert the Prussians and Yatvags to Christianity.
• The Carmina Burana poetry and song collection is created (approximate date).
• Sundiata starts to rule in Mali (approximate date).
• In the West African village of Siby, Sundiata Keita, founder of the Mali Empire, forces the Malinkés to bind themselves to each other by oath.

Births

• Eudes of Burgundy (d. 1266)
• Hu Sansheng, Chinese historian (d. 1302)

Deaths

• May 2 – William de Braose, 10th Baron Abergavenny (hanged)
• July 28 – Duke Leopold VI of Austria (b. 1176)
• September 23 – Alfonso IX of Leon (b. 1171)
• October 25 – Gilbert de Clare, 5th Earl of Hertford, English soldier (b. 1180)
• December 15 – Otakar I of Bohemia
• December 23 – Berengaria of Navarre, queen of Richard I of England
• Xia Gui, Chinese painter (b. c. 1180) (approximate date).

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