Henri Estienne (/eɪˈtjɛn/; French: [etjɛn]; 1528 or 1531 – 1598), also known as Henricus Stephanus (/ˈstɛfənəs/), was a 16th-century French printer and classical scholar. He was the eldest son of Robert Estienne. He was instructed in Latin, Greek, and Hebrew by his father and would eventually take over the Estienne printing firm which his father owned in 1559 when his father died. His most well-known work was the Thesaurus graecae linguae, which was printed in five volumes. The basis of Greek lexicology, no thesaurus would rival that of Estienne's for three hundred years.