The Austrian nobleman Christoph Carl Fernberger was the first Austrian who crossed the Pacific Ocean involuntarily in the years 1622-1628. From the period before 1668 there are only a few accounts of the Chamorro so that any surviving documentary material becomes important evidence in evaluating the accounts of the missionaries. In the private archives of the Counts of Harrach in Vienna there is a diary (post eventum) of Christoph Carl Fernberger who visited the Marianas in 1623 in the course of his circumnavigation of the world. Although Fernberger's account is very brief and somewhat incomplete it provides some interesting details of Chamor-ro life in the period in which first contact between Europeans and natives took place. The article highlights Fernberger's origin and important steps of his journey.