In Rome, after unity was restored following the Western Schism, humanist circles, cultivating philosophy and searching out and sharing ancient texts tended to gather where there was access to a library. The Vatican Library was not coordinated until 1475 and was never catalogued or widely accessible: not all popes looked with satisfaction at gatherings of unsupervised intellectuals. At the head of this movement for renewal in Rome was Cardinal Bessarion, whose house from the mid-century was the centre of a flourishing academy of Neoplatonic philosophy and a varied intellectual culture. His valuable Greek as well as Latin library (eventually bequeathed to the city of Venice after he withdrew from Rome) was at the disposal of the academicians. Bessarion, in the latter years of his life, retired from Rome to Ravenna, but he left behind him ardent adherents of the classic philosophy. The next generation of humanists were bolder admirers of pagan culture, especially in the highly personal academy of Pomponius Leto, the natural son of a nobleman of the Sanseverino family, born in Calabria but known by his academic name, who devoted his energies to the enthusiastic study of classical antiquity, and attracted a great number of disciples and admirers. He was a worshipper not merely of the literary and artistic form, but also of the ideas and spirit of classic paganism, which made him appear a condemner of Christianity and an enemy of the Church. In his academy every member assumed a classical name. Its principal members were humanists, like Bessarion's protégé Giovanni Antonio Campani (Campanus), Bartolomeo Platina, the papal librarian, and Filippo Buonaccorsi, and young visitors who received polish in the academic circle, like Publio Fausto Andrelini of Bologna who took the New Learning to the University of Paris, to the discomfiture of his friend Erasmus. In their self-confidence, these first intellectual neopagans compromised themselves politically, at a time when Rome was full of conspiracies fomented by the Roman barons and the neighbouring princes: Paul II (1464–71) caused Pomponio and the leaders of the academy to be arrested on charges of irreligion, immorality, and conspiracy against the Pope. The prisoners begged so earnestly for mercy, and with such protestations of repentance, that they were pardoned. The Letonian academy, however, collapsed.