Nineteen Old Poems (traditional Chinese: 古詩十九首; simplified Chinese: 古诗十九首; pinyin: Gǔshī Shíjiǔ Shǒu), also known as Ku-shih shih-chiu shih is an anthology of Chinese poems, consisting of nineteen poems collected during the Han Dynasty. These nineteen poems were very influential in regards to later poetry, in part because of their use of the five-character line (or, wuyen shi).[1] The dating of the original poems is uncertain, though in their present form they can be traced back to about 520 CE, when these poems were included in the famous literary analogy Wen Xuan. The Nineteen Old Poems have been supposed to date mainly from the second century CE.[2] The gushi, or old style, poetry developed as an important poetic form of Classical Chinese poetry, in subsequent eras.