The volume contains the correspondence between the papal state secretariat and the papal diplomats in Vienna, covering the period November 1634 to end 1635. This was a period both of intensive efforts on the part of the Pope to bring about a general peace congress and of an exacerbation of hostilities in Europe through France's official intervention in the war. The papal nuncios report in detail on their negotiations with Emperor Ferdinand II and his counselors, on their efforts to institute a less suspicious climate between the Imperial court and Pope Urban VIII, and also on many current events in political and cultural life.