The place of Celtes was filled in Maximilian's estimation by Stabius and Cuspinian. The former, who had been crowned poet in 1502, was appointed Historiographer by the Emperor in 1508, and was virtually monopolized for historical research. Even during Maximilian's last illness Stabius was employed to read aloud volumes of Austrian history.[130] But his achievements in the field of history are of trifling value, and are not to be compared to his works on geographical and mathematical subjects. Cuspinian is much more worthy of consideration, especially as his relations with Maximilian drew him in the same direction as Peutinger. Already Rector of Vienna University in 1500, he was incessantly employed by the Emperor on embassies and in affairs of politics. In the course of five years he was engaged in no fewer than twenty-four missions to Hungary, and he took the leading part in the negotiations of 1507 and 1515, which resulted in the double marriage between Austria and Bohemia-Hungary, and the close union of Maximilian with Uladislas (1515). Nothwithstanding his political activity, he found time for medical and historical pursuits, lectures and public addresses on Philosophy and Rhetoric, and elaborate discussions {105} with his Humanist friends. Besides editing several of the later classical authors,[131] he brought out the _Weltchronik_ of Bishop Otto of Freisingen, and the same writer's _Warlike Deeds of Frederick Barbarossa_. His own productions include an account of the Congress of Princes at Vienna in 1515, and a sketch of _The Origin, Religion and Tyranny of the Turks_, which naturally roused Imperial interest. All his most important works exhibit traces of his connexion with Maximilian. His _Commentarii de Romanorum Consulibus_ are probably the most profound and critical; but his history _De Caesaribus et Imperatoribus Romanorum_,[132] which employed him between the years 1512 and 1522, undoubtedly possesses the most practical interest, since it furnishes us with many valuable details of Maximilian's life and character. His other work, _Austria_, contains a complete history of the country up till 1519, as well as a geographical and topographical description of its several provinces. Unhappily it was not published till 1553, and by that time the maps which were to have been included had disappeared.