Extensive and important as were the reforms of Frederick, it was from the munificent and discerning patronage extended to science and literature that is derived his most enduring claim to the gratitude and commendation of posterity. The impressions imparted by Moslem taste, in the prosecution of early studies, during the formation of his character, never lost their power. His court was frequented by the most accomplished Jews and Arabs of the age. They were the favorite instructors of youth. Their opinions, drawn from the sources of classic and Oriental learning, were heard with respect and awe, even by those who dissented from their creeds and deprecated their influence. They filled the most responsible and lucrative offices of the government. Admitted to friendly and confidential audiences with the sovereign, who, himself an excellent mathematician, delighted to pose them with abstruse problems in geometry and algebra, their philosophy was regarded with signal disfavor by distinguished prelates that daily, in halls and antechambers, impatiently awaited the pleasure of the Emperor. So fond was Frederick of these intellectual diversions, that he sent certain questions for solution to the Mohammedan countries of Africa and the East; but no one was found competent to answer them until they reached the court of one of the princes of Moorish Spain. One of the most accomplished of linguists, Frederick sedulously encouraged the study of languages throughout his dominions. Arabic, Hebrew, and Greek were understood and spoken by all who made any pretensions to thorough education. Naples and Salerno were the most famous seats of learning in that epoch,--at the former was the University established by the Emperor; the Medical College of Salerno is justly celebrated as one of the most extraordinary academical institutions that has ever existed. The Faculty of the University was composed of the most eminent scholars who could be attracted by ample salaries, the prospect of literary distinction, and the certain favor of an enlightened monarch. The resources of all countries were diligently laid under contribution to insure the success of this noble foundation. The popularity of Frederick with the Moslem princes of the East gave him exceptional facilities for the acquirement of literary treasures. The collections of Egypt and Syria and of the monasteries of Europe were ransacked for rare and curious volumes with which to furnish the library of the great Neapolitan college. No city was better adapted to the necessities of a large scholastic institution than Naples. Its situation in the centre of the Mediterranean, the salubrity of the climate, the cheapness and variety of its markets, offered unusual inducements to poor and ambitious students desirous of an education. Their interests were protected and their security assured by special and rigorous laws. Extraordinary precautions were taken to prevent their being molested during their journeys to and fro.