The monograph is focused on three essential research problems identified by the key terms used in its title. The analysis covers concepts that previously were not subject to in-depth research projects: the MediaPolis, a MediaEgo and evolution of the political communication paradigm, observed and analysed on the political scene in Poland. Evolution of the public sphere and the media requires consideration of the causes of ongoing changes and of forecast transformations initiated by those changes. Hence, the research project focused on the sphere that emerged in an intersection of known discourse areas - public, political, meta-political and media discourses. The monograph summarizes years of research into the proposed concepts of a MediaEgo politician and the MediaPolis public sphere.