The book brings together contributions to theorising comparative public law in order to highlight its distinctive features. Nationality was an important criterion in the selection of the many possible contributions. This is because the presentation of contributions from Germany is the second aim of this work. Comparative constitutional law (as well as international law or European public law) is still characterised by national traditions and contexts. Taking these traditions and contexts into account, however controversial they may be, helps to create a transnational but rooted field of comparative public law. Such rootedness is valuable in a world that celebrates diversity and self-determination.