In 2014, the International Association for the Psychology of Religion (IAPR) will have its centennial, and so will its scientific journal, the present Archive for the Psychology of Religion [Archiv für Religionspsychologie, ARp]. This first article on IAPR’s (pre)history analyses the fate of the forerunner of ARp, which was published from 1907-1913. When psychology in general began to develop as an empirical, research-based "scientific discipline" since the midst of the 19th century, the psychology of religion became a prominent application of that "new" science of psychology, involving many of the founding fathers of present day psychology. Shortly after evoking these beginnings, the focus of the present article turns to the development of...