This volume is devoted to the spheres in which conflict and rivalries unfolded during the Renaissance and how these social, cultural and geographical settings conditioned the polemics themselves. This is the second of three volumes on ‘Renaissance Conflict and Rivalries’, which together present the results of research pursued in an International Leverhulme Network. The underlying assumption of the essays in this volume is that conflict and rivalries took place in the public sphere that cannot be understood as single, all-inclusive and universally accessible, but needs rather to be seen as a conglomerate of segments of the public sphere, depending on the persons and the settings involved. The articles collected here address various questions concerning the construction of different segments of the public sphere in Renaissance conflict and rivalries, as well as the communication processes that went on in these spaces to initiate, control and resolve polemical exchanges.