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1225

 

1221 1222 1223 1224 1225 1226 1227 1228 1229 1230

Contents:

political events
technology
literature
music

political events

English forces regain territory taken by the French last year with the exceptions of Poitou, the Limousin, and Perigord.

Pope Honorious III obtains the release of Denmark's Valdemar II, who has been imprisoned by Heinrich, count of Schwerin. The pope threatens to excommunicate the Holy Roman Emperor Friederich II if the emperor does not embark on his promised crusade by August 1227.

The Nicaean emperor John III Vatatzes defeats Latin forces who have supported the brothers of the late Theodore Lascaris and makes himself master of Asia Minor, but Theodore Ducas, despot of Epirus, takes Thessalonica, proclaims himself Byzantine emperor, and routs John's forces when they try to take Adrianople (see 1223; 1230).

The 34th Abbasid caliph an-Nasir dies after a 45-year reign in which he has tried to unify the Islamic world politically and morally. His chief concern has been to restore the caliphate's former temporal power while the empire of the Seljuk Turks was collapsing in the east, and he has had considerable success in fighting the Persians, Turks, and, more recently, the Mongols, but in the absence of a strong successor his dynasty will not survive (see 1258).

technology

Cotton textiles are manufactured in Spain. The fabrics will compete with linen and wool (see 3000 B.C.).

literature

Poetry: Roman de la Rose by French poet Guillaume de Lorris, whose allegorical metrical romance of courtly wooing will be completed by Jean de Meung (Jehan Clopinel).

music

"Sumer is icumen in" is sung as a round in England.

1221 1222 1223 1224 1225 1226 1227 1228 1229 1230


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Sci & Tech Chronology: In the year 1225
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Construction

Work starts on the Cathedral of Saint Pierre in Beauvais, France, planned to be one of the largest of Gothic cathedrals, with a vault 45 m (148 ft) tall that would be the highest ever built. See also 1194 Construction; 1284 Construction.

Mathematics

Fibonacci's Liber quadratorum deals with Diophantine equations of the second degree. He observes that the roots of x 3 + 2x 2 + 10x = 20 cannot be constructed with ruler and straightedge; in modern terms, this means that irrational numbers exist beyond those discovered by Greek geometers. See also 1150 Mathematics; 1970 Mathematics.


Wikipedia: 1225
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Years:
1222 1223 1224 – 1225 – 1226 1227 1228
Decades:
1190s 1200s 1210s1220s1230s 1240s 1250s
Centuries:
12th century13th century14th century
1225 by topic
Politics
State leaders – Sovereign states
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Art and literature
1225 in poetry
1225 in other calendars
Gregorian calendar 1225
MCCXXV
Ab urbe condita 1978
Armenian calendar 674
ԹՎ ՈՀԴ
Bahá'í calendar -619 – -618
Berber calendar 2175
Buddhist calendar 1769
Burmese calendar 587
Byzantine calendar 6733 – 6734
Chinese calendar 甲申年十一月廿一日
(3861/3921-11-21)
— to —
乙酉年十二月初一日
(3862/3922-12-1)
Coptic calendar 941 – 942
Ethiopian calendar 1217 – 1218
Hebrew calendar 4985 – 4986
Hindu calendars
 - Vikram Samvat 1280 – 1281
 - Shaka Samvat 1147 – 1148
 - Kali Yuga 4326 – 4327
Holocene calendar 11225
Iranian calendar 603 – 604
Islamic calendar 621 – 622
Japanese calendar
Korean calendar 3558
Thai solar calendar 1768

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Copyrights:

World Chronology. People's Chronology. Copyright © 2005 by The Gale Group, Inc. All rights reserved.  Read more
Sci & Tech Chronology. History of Science and Technology, edited by Bryan Bunch and Alexander Hellemans. Copyright © 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.  Read more
Wikipedia. This article is licensed under the Creative Commons Attribution/Share-Alike License. It uses material from the Wikipedia article "1225" Read more