Dream of the Red Chamber (also "Red Chamber Dream", "Hung Lou Meng" or "A Dream of Red Mansions") (), originally The Story of the Stone (), is thought to be a great work of Chinese literature and is one of the Chinese Four Great Classical Novels. The novel was written in the middle of the 18th century during the Qing Dynasty. Its author is thought to be Cao Xueqin (Chinese: 曹雪芹). Redology is the study of the book.