Almost all of Pann's work drew on recent or ancient sources, which he reinterpreted to suit the tastes of his public. In the 1880s, the scholar Moses Gaster revealed that one of Pann's major works, "Înţeleptul Archir şi nepotul său Anadam" ("The Wise Archir and His Nephew Anadam"), made ingenious use of an old and much-circulated biography of Aesop. In researching various fables which Pann had used to expand on his proverbs, Gaster noted that they echoed obscure medieval material (including the "Gesta Romanorum", Giulio Cesare Croce's "Le sottilissime astutie di Bertoldo", and even Siberian Turkic folklore). One of his main pieces, the fable of the mouse who pictures himself king of all animals, originated with the "Panchatantra". Tudor Vianu indicated that, in writing his book on morals ("Hristoitia"), Pann integrated text from Desiderius Erasmus' "Adagia".