In 1885, on the fields of the village Breg, during the excavations of the eastern necropolis of the Roman municipality Nevidunum (Drnovo near Krško), which were conducted under the auspices of the Provincial Museum of Carniola, archaeologist Jernej Pečnik from Krško discovered a grave composed of slabs of rocks covered with a beautifully shaped tombstone with the following inscription: C(aius) Marci-/us C(ai) f(ilius) / Ceiler / praec(eptor) gr(ammaticus ?, Graecus?) / 5an(norum) L h(ic) s(itus.) / Pompeia / Q(uinti) f(ilia) Respec-/ ta sibi et con-/ [i]ugi v(iva) f(ecit). The monument was erected by Pompeja Respekta for her husband Gaius Marcius Ceiler, who died fifty years of age. She also stated his profession with the abbreviated phrase praeceptor gr, which can be interpreted as a grammar teacher or teacher of Greek language. Based on this and other testimonies in antique sources, the paper will illuminate the position and role of a teacher in the antique society, and present the educational practices in the antique educational system