The author of the text, Hartmann Schedel, was a medical doctor, humanist and book collector. He earned a doctorate in medicine in Padua in 1466, then settled in Nuremberg to practice medicine and collect books. According to an inventory done in 1498, Schedel's personal library contained 370 manuscripts and 670 printed books. The author used passages from the classical and medieval works in this collection to compose the text of Chronicle. He borrowed most frequently from another humanist chronicle, "Supplementum Chronicarum", by Giacomo Filippo Foresti of Bergamo. It has been estimated that about 90% of the text is pieced together from works on humanities, science, philosophy, and theology, while about 10% of the chronicle is Schedel's original composition.