The Greek-German school dictionary developed in the second half of the 19th century by Gustav Eduard Benseler, is still an essential reference work today, thanks especially to the last extensive revision in 1931. The main content of the dictionary was based on the works of Homer, Herodotus, Aischylos, Sophokles, Euripides, Thucydides, Xenophon, Plato, Lysias and the New Testament.