The present study examines the role classical Latin authors played in the beginnings of Latin literacy in medieval Hungary - from the point of view of the history of libraries. It focuses on four sources: a letter of Bishop Fulbert of Chartres to Bishop Bonipert of Pécs, the Institutio of King Saint Stephen of Hungary, the Deliberatio of Bishop Saint Gerard of Csanád, and the book list of the Benedictine abbey of Pannonhalma.