Lorenzo early perceived that the blind enmity which ruined Pisa was overshooting the mark. As his family held considerable property in the district he frequently had occasion to visit the city, whose position made it a halting-place for many travellers between northern and southern Italy. Pisa must not be allowed to give the Florentines any more trouble, but neither should it be allowed to perish. Two considerations in particular seem to have prompted the re-establishment of the old university. The first was the quiet, which was more favourable to study than the busy life of Florence; the second was the number and cheapness of dwellings, which were in increasing danger of falling to ruin since trade had departed from its old abodes, and the inhabitants were nearly all poor people. Yet Lorenzo needed great power and moral courage to set himself against rooted hatred and stubborn prejudices. On December 19, 1472, was issued the decree by which the university was restored to life.[91] A board of management was appointed—the Officiales studii—consisting of five Florentine citizens: Tommaso Ridolfi, Donato Acciaiuolo, Andrea Puccini, Alamanno Rinuccini, and Lorenzo de’ Medici. The yearly endowment was to consist of 6,000 gold florins, and the statutes of the University of Florence were to be in force at that of Pisa. Members of the state were to be entitled to academical honours and the authority to practise in Pisa alone. To raise the salaries of the professors, Pope Sixtus IV. consented to a tax on the clergy to the amount of 5,000 florins in five years, a tax which was renewed by his successor in 1497 for another five years, and drew complaints from Ficino, Poliziano, and others. Only the philosophical and literary branches of study were to continue at Florence.