It was not until 1571 that Patrizi put forward his first major philosophical work in a more narrowly construed sense, when the first part of his “Peripatetic Discussions” (Discussiones peripateticae) appeared at Venice; a greatly expanded version would be published at Basel ten years later. The Discussiones would constitute one of Patrizi's most important contributions to Renaissance philosophy. It provided a thoroughgoing analysis and critique of Aristotle's thought, which continued to be the most influential source in theological as well as secular philosophical settings in the sixteenth century. In addition to taking on the leading philosophical tradition of his day, Patrizi's work would serve as the basis for his own development of an anti-Aristotelian philosophy in the years ahead. [see section 2].