Giovanni da Pian del Carpine
He accompanied Giovanni da Pian del Carpine in his journey as delegate of Pope Innocent IV to the Great Khan Güyük of the Mongol Empire in 1245-1247. He was the author of the brief chronicle "De itinere Fratrum Minorum ad Tartaros" (On the Journey of the Franciscan Friars to the Tatars), published only in the 1839 in France (and a year later in Poland) and the source for a longer work, "Hystoria Tartarorum" (History of the Tatars), discovered and published only in 1965.