The course will follow the path through which Greek philosophy became, already in late antiquity and much more during the Middle Ages, into a multi-linguistic and multi-cultural project. We shall see that during this period it is impossible to differentiate between abstract forms of thought (philosophical, theological, scientific) and norms of political and public action (political, religious and social). We shall follow dynamic paths of knowledge in inter-cultural migration, in constant situation of polemic and controversy and through the systematic development of hermeneutic tools to engage with canonic texts. The focal point of the course will be the development of medieval European thought, which laid fundaments to Renaissance, Humanism, Reformation, and Scientific Revolution. We shall not, however, completely ignore the intensive interface with parallel culture (Greek-Byzantine, Arabic, and Hebrew). The historic structures will be followed by intellectual biographies of key figures and systematic analysis of some repeatedly discussed issues of medieval philosophic literature.