But if the literary side of humanism has been a barrier to the progress of scientific history, the discovery and elucidation of texts first made that progress possible. Historical criticism soon awoke. Laurentius Valla's brilliant attack on the "Donation of Constantine" (1440), and Ulrich von Hutten's rehabilitation of Henry IV. from monkish tales mark the rise of the new science. One sees at a glance what an engine of controversy it was to be; yet for a while it remained but a phase of humanism. It was north of the Alps that it parted company with the grammarians. Classical antiquity was an Italian past, the German scholars turned back to the sources of their national history. Aeneas Sylvius Piccolomini (Pius II.) had discovered Otto of Freising and Jordanes. Maximilian I. encouraged the search for manuscripts, and Vienna became a great humanistic centre. Conrad Celtes left his _Germania illustrata_ unfinished, but he had found the works of Hroswitha. Conrad Peutinger gathered all sorts of Chronicles in his room in Vienna, and published several,--among them Gregory of Tours. This national movement of the 15th century was not paralleled in France or England, where the classical humanities reigned. The Reformation meanwhile gave another turn to the work of German scholars. The Reformation, with its heated controversies, seems a strange starting-point for science, yet it, even more than the Renaissance, brought out scientific methods of historical investigation. It not only sobered the humanist tendency to sacrifice truth for aesthetic effect, it called for the documents of the Church and subjected them to the most hostile criticism. Luther himself challenged them. Then in the _Magdeburg Centuries_ (1559-1574) Protestantism tried to make good its attack on the medieval Church by a great collection of sources accompanied with much destructive criticism. This gigantic work is the first monument of modern historical research. The reply of Cardinal Baronius (_Annales ecclesiastici_, 1588-1697) was a still greater collection, drawn from archives which till then had not been used for scientific history. Baronius' criticism and texts are faulty, though far surpassing anything before his day, and his collection is the basis for most subsequent ones,--in spite of J. J. Scaliger's refutation, which was to contain an equal number of volumes of the errors in Baronius.