renewed interest in literature and the arts in 13th-century Italy. Italian scholars discovered Ancient Greek thought, particularly that of Aristotle, through Arabic translations from Africa and Spain. Other centers were Verona, Naples, and Avignon. Petrarch, who is often referred to as the father of humanism, is a significant figure. Petrarch was raised in Avignon; he was inclined toward education at a very early age and studied alongside his well-educated father. Petrarch'ims enthusiasm for ancient texts led him to discover manuscripts such as Cicero's Pro Archia and Pomponius Mela's De Chorographia that were influential in the development of the Renaissance. Petrarch wrote Latin poems such as Canzoniere and De viris illustribus, in which he described humanist ideas. His most-significant contribution was a list of books outlining the four major disciplines—rhetoric, moral philosophy, poetry, and grammar—that became the basis of humanistic studies (studia humanitatis). Petrarch's list relied heavily on ancient writers, especially Cicero. The revival of classicist authors continued after Petrarch's death. Florence chancellor and humanist Coluccio Salutati made his city a prominent center of Renaissance humanism; his circle included other notable humanists—including Leonardo Bruni, who rediscovered, translated, and popularized ancient texts. Humanists heavily influenced education. Vittorino da Feltre and Guarino Veronese created schools based on humanistic principles; their curriculum was widely adopted and by the 16th century, humanistic paideia was the dominant outlook of pre-university education. Parallel with advances in education, Renaissance humanists made progress in fields such as philosophy, mathematics, and religion. In philosophy, Angelo Poliziano, Nicholas of Cusa, and Marsilio Ficino further contributed to the understanding of ancient classical philosophers and Giovanni Pico della Mirandola undermined the dominance of Aristotelian philosophy by revitalizing Sextus Empiricus' skepticism. Religious studies were affected by the growth of Renaissance humanism when Pope Nicholas V initiated the translation of Hebrew and Greek biblical texts, and other texts in those languages, to contemporaneous Latin. Humanist values spread from Italy in the 15th century. Students and scholars went to Italy to study before returning to their homelands carrying humanistic messages. Printing houses dedicated to ancient texts were established in Venice, Basel, and Paris. By the end of 15th century, the center of humanism had shifted from Italy to northern Europe, with Erasmus of Rotterdam being the leading humanist scholar. The longest-lasting effect of Renaissance humanism was its education curriculum and methods. Humanists insisted on the importance of classical literature in providing intellectual discipline, moral standards, and