Page "Altaic languages" Paragraph 34

The most important text for the study of early Korean is the Hyangga, a collection of 25 poems, of which some go back to the Three Kingdoms period ( 57 – 668 AD ), but are preserved in an orthography that only goes back to the 9th century AD ( Miller 1996: 60 ).

Korean is copiously attested from the mid-15th century on in the phonetically precise Hangul system of writing ( ib.

61 ).