Nationality words link to articles with information on the nation's poetry or literature (for instance, Irish or France).

1400:

• Sir Gawain and the Green Knight completed (started around 1350)
• Geoffrey Chaucer, The Canterbury Tales, left incomplete with the author's death this year

1402:

• Pere de Queralt appointed ambassador to Tunis

Death years link to the corresponding "[year] in poetry" article:

1400:

• Olivier Basselin (died 1450), French poet
• Raighu (died 1479), Apabhraṃśa poet

1402:

• Nezahualcoyotl (died 1472), philosopher, poet and ruler (tlatoani) of the city-state of Texcoco in pre-Columbian Mexico

1403:

• Gilbert Hay, or perhaps "Sir Gilbert the Hay", who may have been a different person; last mentioned this year (died 1455), Scottish poet and translator

1404:

• Leon Battista Alberti (born 1472), Italian author, artist, architect, poet, priest, linguist, philosopher, and cryptographer

1405:

• Sir Thomas Malory (died 1471), English writer, and author of Le Morte d'Arthur
• Georges Chastellain born 1405 or 1415 (died 1475), Burgundians chronicler and poet

1408:

• Annamacharya (died 1503), mystic saint composer of the 15th century, widely regarded as the Telugu "pada kavita pitaamaha" (grand old man of simple poetry); husband of Tallapaka Tirumalamma
• Chandidas (died unknown), refers to (possibly more than one) medieval poet of Bengal

1409:

• Liu Jue (died 1472), Chinese landscape painter, calligrapher, and poet

Birth years link to the corresponding "[year] in poetry" article:

1400:

• Geoffrey Chaucer (born 1343), English author, poet, philosopher, bureaucrat, courtier and diplomat
• Jan of Jenštejn (born 1348), Archbishop of Prague who was a poet, writer and composer
• Kamal Khujandi (born unknown), Persian(Tajik) Sufi and Persian ghazal poet
• William Langland (born 1332), conjectured author of the 14th-century English dream-vision Piers Plowman
• Franco Sacchetti (born 1335), Italian poet and novelist

1405:

• Gilabert de Próixita (born unknown), Valencian poet with twenty-one extant Occitan pieces
• Jean Froissart (born 1337), French chronicler and poet

• Poetry
• 15th century in poetry
• 15th century in literature