Nguyễn Gia Thiều (chữ Hán: 阮嘉韶, 1741–1798), courtesy name Quang Thanh (光聲), pen name Đạm Trai (澹齋), formal title Ôn Như hầu (溫如侯), was a Vietnamese poet in the 18th century.
His best known work, the "Lament of a Royal Concubine" or "The Complaints of the Royal Harem" (Cung Oán Ngâm Khúc), is an example of song thất lục bát ("double seven, six eight") form of nôm poetry in the ngâm "lament" style.
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