In 1264 we find a public school in operation at Ferrara. By its charter the professors were exempt from military service. The University of Piacenza came into existence a little earlier. Innocent IV. established it in 1248, with privileges similar to those of Paris and Bologna. An important group of _studi pubblici_ owed their origin to Papal or Imperial charters in the first half of the fourteenth century. That of Perugia was founded in 1307 by a Bull of Clement V. That of Rome dated from 1303, in which year Boniface VIII. gave it a constitution by a special edict; but the translation of the Papal See to Avignon caused it to fall into premature decadence. The University of Pisa had already existed for some years, when it received a charter in 1343 from Clement VI. That of Florence was first founded in 1321.[78] In 1348 a place for its public buildings was assigned between the Duomo and the Palazzo Pubblico, on the site of what was afterwards known as the Collegium Eugenianum. A council of eight burghers was appointed for its management, and a yearly sum was set apart for its maintenance. In 1349 Clement VI. gave it the same privileges as the University of Bologna, while in 1364 it received an Imperial diploma from Charles IV. The same emperor granted charters to Siena in 1357, to Arezzo in 1356, and to Lucca in 1369. In 1362 Galeazzo Visconti obtained a charter for his University of Pavia from Charles IV., with the privileges of Paris, Oxford, and Bologna. [Footnote 78: See Von Reumont, _Lorenzo de' Medici_, vol. i. p. 521.]