In the 19th and early 20th centuries, blossoming constitutional movements in the Middle East drew participants from different ethno-religious (Tunisia and Mount Lebanon, Jews, Armenians, Iranians and Greeks), cultural, and ideological backgrounds. These individuals relied on debate and interaction with one another to form coherence out of movements from a range of disparate views. This paper explores these two concepts, constitutional reform and the politics of communal organization and administration among Ottoman-Armenians by contextualizing the Armenian National Constitution of 1863 as an element within the wider framework of Ottoman social, religious and educational reforms in the 19th and 20th centuries. Tracing the development and the ways in which communal institutions functioned in the center as well as in the provinces, this paper discusses the processes of solidification of communal boundaries and the rigidification of religious identities during a period of major imperial reorganization and social reshuffling. By focusing on various cases from the capital and the provinces, I examine how (and to what extent) constitutionalism was practiced on the micro-community level, and what were the debates and challenges that it generated. Zooming on the social processes that were taking place among the Ottoman-Armenian community, this research traces the emergence and fall of the Constitutional Order (by the mid-century) among these Ottoman subjects and its gradual replacement with a Radical Order, a new communal configuration marked by the rise of revolutionary and radical politics.