PRIVILEGES AND IMMUNITIES GRANTED. The grant of privileges to physicians and teachers made by the Emperor Constantine, in 333 A.D. (R. 26), and the privileges and immunities granted to the clergy (_clerici_) by the early Christian Roman Emperors (R. 38), doubtless formed a basis for the many grants of special privileges made to the professors and students in the early universities. The document promulgated by Frederick Barbarossa, in 1158 (R. 101), began the granting of privileges to the _studia generalia_, and this was followed by numerous other grants. The grant to students of freedom from trial by the city authorities, and the obligation of every citizen of Paris to seize any one seen striking a student, granted by Philip Augustus, in 1200 (R. 102), is another example, widely followed, of the bestowal of large privileges. Count Rupert I, in founding the University of Heidelberg, in 1386, granted many privileges, exempted the students from "any duty, levy, imposts, tolls, excises, or other exactions whatever" while coming to, studying at, or returning home from the university (R. 103). The exemption from taxation (R. 104) became a matter of form, and was afterwards followed in the chartering of American colleges (R. 187). Exemption from military service also was granted. So valuable an asset was a university to a city, and so easy was it for a university to move almost overnight, that cities often, and at times even nations, encouraged not only the founding of universities, but also the migration of both faculties and students. An interesting case of a city bidding for the presence of a university is that of Vercelli (R. 105), which made a binding agreement, as a part of the city charter, whereby the city agreed with a body of masters and students "swarming" from Padua to loan the students money at lower than the regular rates, to see that there was plenty of food in the markets at no increase in prices, and to protect the students from injustice. An instance of bidding by a State is the case of Cambridge, which obtained quite an addition by the coming of striking Paris masters and students in 1229, in response to the pledge of King Henry III (R. 109), who "humbly sympathized with them for their sufferings at Paris," and promised them that if they would come "to our kingdom of England and remain there to study" he would assign to them "cities, boroughs, towns, whatsoever you may wish to select, and in every fitting way will cause you to rejoice in a state of liberty and tranquillity."