The topic of public space has become an interdisciplinary topic as well as a public matter. Different participants in discussions and decision making processes on public space have different expectations. The topic of public space has its historical development and interdisciplinary intersection. The urban planning and design relations of the topic are indisputable. In this respect, the question of what is the historic, current and future position and role of an architect in the decision making process as for public spaces is quite natural. The legislative definition of the term public space appears to be a problem especially if we would like to derive professional competences from the definition.