 Olivi produced a large and wide-ranging body of work, much of which has survived. By far the most important philosophical text is his Summa of questions on Peter Lombard’s Sentences, a massive work he began writing soon after leaving Paris and redacted to its final form in the mid-1290s. This masterpiece of medieval philosophy remains still largely untranslated, and edited only in part. Olivi’s views on metaphysics and human nature are mostly found in his questions on Bk. II (ed. Jansen, 1922–26). Material on the virtues is found in Bk. III (ed. Emmen and Stadter, 1981). Other philosophically relevant works include his Quodlibeta from 1289–95 (ed. Defraia, 2002), a set of questions on logic (ed. Brown, 1986), and the Questions on Evangelical Perfection. Many of his biblical commentaries, the historically significant Commentary on the Apocalypse, and various texts pertaining to his condemnation have survived and are available in modern editions. (For a recent list of editions, see König-Pralong et al. 2010; for the dating of works, see Piron 2020a.) In this article we provide a brief outline of the most significant philosophical views that Olivi defended, both in theoretical and practical philosophy.