In a time of massive persecution of Protestantism in the Habsburg Empire, chapels in the embassies of Denmark, Sweden and the Netherlands became a refuge for a timid evangelical life in (almost exclusively) Catholic Vienna. The foundation stone for a subculture was laid. Despite the harsh persecution measures that were used against Protestantism in the Habsburg Monarchy during the early modern period, there have been three places in the capital and residence of Vienna since the end of the 17th century , where evangelical preachers were allowed to exercise their functions completely legally. The embassies of Denmark, Sweden and the Netherlands maintained so-called legation bands on their premises, which became Protestant enclaves. Since the 1720s, the Danish and Swedish preaching posts have been filled almost exclusively by Pietists of Halle origin, who closely monitor religious policy in the entire Habsburg Empire and use their networks for numerous interventions. The scope, scope and inventiveness of the preachers and their "sociotope" are presented in detail for the first time in this volume for the reign of Emperor Charles VI.