12) Henry VI, king of England. The Columbia Encyclopedia, Sixth Edition. 2001
...Henry VI, king of England, 1421-71, king of England (1422-61, 1470-71). 1 Reign Early YearsThe only son of Henry V and Catherine of Valois, he became king of England...

13) Muhammad I, Ottoman sultan. The Columbia Encyclopedia, Sixth Edition. 2001
...Muhammad I, Ottoman sultan, or Mehmet I (memet´) (KEY) (Muhammad the Restorer), 1389?-1421, Ottoman sultan (1413-21), son of Beyazid I. By defeating his brothers...

14) § 147. graduate. 3. Word Choice. The American Heritage Book of English Usage. 1996
...graduate has denoted the action of conferring an academic degree or diploma since at least 1421. Accordingly, the action of receiving a degree should be expressed...

15) Nanni d'Antonio di Banco. The Columbia Encyclopedia, Sixth Edition. 2001
...Nanni d Antonio di Banco, (nan´ne danton´yo de bang´ko) (KEY) , c.1384-1421, Florentine sculptor. After study with his father, Antonio di Banco, who worked on the...

16) Beijing. The American Heritage® Dictionary of the English Language: Fourth Edition. 2000.
...c. 700 b.c., it served as Kublai Khan's capital (13th century) and the capital of China (1421-1911; 1949-). It is a major commercial and industrial center and the...

17) Nanjing. The American Heritage® Dictionary of the English Language: Fourth Edition. 2000.
...The capital of China from the third to the sixth century a.d. and again from 1368 to 1421, it was opened to foreign trade by the Treaty of Nanking in 1842. It was...

18) Douglas, Archibald, 5th earl of Douglas. The Columbia Encyclopedia, Sixth Edition. 2001
...Douglas, 4th earl of Douglas. He fought in France for the French against the English in 1421 and persuaded his father in 1423 to go to France. Although Douglas was...

19) §2. William Caxton. XIII. The Introduction of Printing into England and the Early Work of the Press. Vol. 2. The End of the Middle Ages. The Cambridge History of English and American Literature: An Encyclopedia in Eighteen Volumes. 1907–21
...William Caxton, our first printer, was born in the weald of Kent between the years 1421 and 1428, probably nearer the earlier date. The weald was largely inhabited...

20) Alfonso V, king of Aragon and Sicily. The Columbia Encyclopedia, Sixth Edition. 2001
...sought his aid against Louis III, rival king of Naples, and, after Alfonso had defeated (1421) Louis, Joanna adopted Alfonso as her heir. They quarreled in 1423,...