Ancient texts of Sappho's poems survive from as early as the third century BC, and as late as the seventh century AD. By the medieval period, Sappho's poetry had been lost, until in the sixteenth century newly printed editions of ancient authors such as Dionysius of Halicarnassus, who had quoted Sappho's "Ode to Aphrodite", began to be produced. Since the second half of the nineteenth century, archaeologists have discovered many fragments of ancient copies of Sappho's poetry, and the amount of her work known has almost doubled.