not to identify intervals of time or periods within the larger history of Thomism because Thomists have addressed such a broad variety of issues and in too many geographical areas to permit such divisions. First Thomistic School The first period of Thomism stretches from Aquinas' teaching activity beginning in 1256 at Paris to Cologne, Orvieto, Viterbo, Rome, and Naples until his canonization in 1325. In this period his doctrines "were both attacked and defended" as for example after his death (1274) the condemnations of 1277, 1284 and 1286 were counteracted by the General Chapters of the Dominican Order and other disciples who came to Aquinas' defense. 1325 to the Council of Trent After Aquinas' canonisation, commentaries on Aquinas increased, especially at Cologne which had previously been a stronghold of Albert the Great's thought. Henry of Gorkum (1386-1431) wrote what may well be the earliest commentary on the Summa Theologiae, followed in due course by his student Denis the Carthusian. Council of Trent to Aeterni Patris Responding to prevailing philosophical rationalism during the Enlightenment Salvatore Roselli, professor of theology at the College of St. Thomas, the future Pontifical University of Saint Thomas Aquinas, Angelicum in Rome, published a six volume Summa philosophica (1777) giving an Aristotelian interpretation of Aquinas validating the senses as a source of knowledge. While teaching at the College Roselli is considered to have laid the foundation for Neothomism in the nineteenth century. According to historian J.A. Weisheipl in the late 18th and early 19th centuries "everyone who had anything to do with the revival of Thomism in Italy, Spain and France was directly influenced by Roselli’s monumental work. Aeterni Patris to Vatican II The Thomist revival that began in the mid-19th century, sometimes called "neo-scholasticism" or "neo-Thomism," can be traced to figures such as Angelicum professor Tommaso Maria Zigliara, Jesuits Josef Kleutgen, and Giovanni Maria Cornoldi, and secular priest Gaetano Sanseverino. This movement received impetus from Pope Leo XIII's encyclical Aeterni Patris of 1879. Generally the revival accepts the interpretative tradition of Aquinas' great commentators such as Capréolus, Cajetan, and John of St. Thomas. Its focus, however, is less exegetical and more concerned with carrying out the program of deploying a rigorously worked out system of Thomistic metaphysics in a wholesale critique of modern philosophy. Other seminal figures in the early part of the century include Martin Grabmann (1875-1949) and Amato Masnovo (1880-1955). The movement's core philosophical