The aim of the course is to present the issue of European security in its complexity and context. Since this is an introductory bachelor-level course, we will extensively discuss the historical context and the evolution of European security. We will discuss the European security system since the end of the WWII, roles played by key actors and the gradual institutionalization of security and defence cooperation in various formats. While an emphasis is placed on the cooperation in the context of the EC/EU integration process, attention will be also paid to NATO and other settings shaping the security architecture of the European continent. Apart from evaluating roles, strategies and interests of various actors, we will focus on evolving threat perceptions. We will discuss how threat perceptions influence defence policies of individual states and collective strategies enacted by the EU or NATO respectively.