This symposium on mixed constitutions assumes a certain typology of forms. In this paper, I look at constitutional experimentation and innovation. One of the advantages of frequent rewriting of constitutions is the ability to develop new ideas, tailoring global norms to local conditions, and seeing what works. One of the sources of “mixed” constitutions is precisely such innovations which then form raw material for further mixing. The paper will provide several examples of constitutional innovation, which tends to come from the periphery rather than the global core of the field.