Criminality is a phenomenon as old as human civilisation itself and is a worldwide occurrence. The fight with criminality oscillates between restriction and prevention. The global nature of criminality naturally means international cooperation, in the field of prevention as well. A particular example is the CPTED project – Crime prevention through environmental design. Among other things, the CPTED concept supports international cooperation between police, local authorities, developers, planners and architects. The concept of designing out crime is recognised across Europe as a new and innovative method for creating safer environments by engaging all stakeholders in the consultation process at the state of affairs in ancient cities, where the urban designer and the lawmaker shared equal status (Arendt, 2007). In our contribution we intend to outline the connections between town architecture and town planning and security how we perceive them in the process of education at the Faculty of Architecture, STU. This concept is not explicitly anchored in the system of teaching; we rather address it in the frame of activities connected with the quality of the environment, mainly at the Institute of Sustainable and Experimental Architecture. The sustainability of life consists of natural, social, economic and cultural elements. The feeling of security is undoubtedly related to the quality of life.