1403

Millennium:	2nd millennium
Centuries:	14th century – 15th century – 16th century
Decades:	1370s  1380s  1390s  – 1400s –  1410s  1420s  1430s
Years:	1400 1401 1402 – 1403 – 1404 1405 1406

Events of 1403

• Harry "Hotspur" Percy forms an alliance with Welsh rebel Owain Glyndŵr.
• July 21 – Battle of Shrewsbury – King Henry IV of England defeats a rebel army led by "Hotspur" Percy. Percy is killed in the battle by an arrow in his face.

Undated

• Jan Hus begins preaching Wycliffite ideas in Bohemia.
• Ming Emperor Yongle moves the capital of China from Nanjing to Beijing.
• King Martin I of Aragon helps to end the siege by the French of the papal palace in Avignon and Antipope Benedict XIII flees to Aragon.
• King Henry IV of England marries Joanna of Navarre, the daughter of Charles d'Évreux, King of Navarre.
• The Gur-e Amir Mausoleum is built by Timur after the death of his grandson Muhammad-Sultan and eventually becomes the family mausoleum of the Timurid dynasty.
• While the Ottomans are at civil war, the Byzantine Empire reclaim the European coast of the Sea of Marmara and Thessalonica. The emperor's son Andronikos Palaiologos is given the title of Lord of Thessalonike.
• The world's first quarantine station is built. It is built in Venice to quarantine against the Black Death.
• Battle of Modon – the French under Marshal de Boucicaut defeat the Venetians.
• Grand Duke Vytautas ends his alliance with Muscovy and captures Vyazma and Smolensk.
• The Yongle Encyclopedia is commissioned by the Chinese Ming Dynasty emperor Yongle. It was then one of the world's earliest and largest known general encyclopedia.
• Stefan Lazarević establishes Belgrade as the capital of the Serbian Despotate.
• The Worshipful Company of Stationers and Newspaper Makers (better known as the Stationers' Company) is founded in England. It is currently one of the Livery Companies of the City of London.
• Georgia makes peace with Timur but has to recognise him as a suzerain and pay him tribute.
• Ououso becomes King of Nanzan in present-day south Okinawa, Japan.
• Tadgh Ruadh mac Maelsechlainn O Cellaigh succeeds Conchobar an Abaidh mac Maelsechlainn O Cellaigh as King of Hy-Many in present-day County Galway and County Roscommon in Ireland.
• Maolmhordha mac Con Connacht succeeds Giolla Iosa mac Pilib as King of East Breifne, in present-day County Leitrim and County Cavan, Ireland.
• Balša III succeeds his father Đurađ II as ruler of the Principality of Zeta (now the Republic of Montenegro).
• The Temple of a City God is constructed in Shanghai, China.

1403 in other calendars

Gregorian calendar	1403 MCDIII
Ab urbe condita	2156
Armenian calendar	852 ԹՎ ՊԾԲ
Assyrian calendar	6153
Bahá'í calendar	-441–-440
Bengali calendar	810
Berber calendar	2353
English Regnal year	4 Hen. 4 – 5 Hen. 4
Buddhist calendar	1947
Burmese calendar	765
Byzantine calendar	6911–6912
Chinese calendar	壬午年十二月初八日 (4039/4099-12-8) — to — 癸未年閏十一月十八日 (4040/4100-intercalary 11-18)
Coptic calendar	1119–1120
Ethiopian calendar	1395–1396
Hebrew calendar	5163–5164
Hindu calendars
- Vikram Samvat	1459–1460
- Shaka Samvat	1325–1326
- Kali Yuga	4504–4505
Holocene calendar	11403
Iranian calendar	781–782
Islamic calendar	805–806
Japanese calendar	Ōei 10 (応永10年)
Korean calendar	3736
Minguo calendar	509 before ROC 民前509年
Thai solar calendar	1946

Births

• February 22 – King Charles VII of France (died 1461)
• June 11 – John IV, Duke of Brabant (d. 1427)
• date unknown – Robert Wingfield, English politician (died 1454)

Deaths

• May 10 – Katherine Swynford, widow of John of Gaunt
• May 12 – William de Lode, English prior
• July 21
  • Henry Percy, English soldier (killed in battle)
  • Edmund Stafford, 5th Earl of Stafford (killed in battle)
• July 23 – Thomas Percy, 1st Earl of Worcester, English rebel (executed) (born 1343)
• date unknown
  • Beyazid, Ottoman Sultan (born 1354)
  • Hajji Zayn al-Attar, Persian physician