Appreciated as an emerging artist – and compared by critics to well-established names[3] – Osswald married in 1907 Elsbeth Leopold, who gave birth to their daughter Agnes Hildegard, known as Hilla, in May of the following year.

With a private studio at his disposal inside the castle, he feverishly painted urban views, factories on the Rhine, vases of flowers, and large winter landscapes.

By now at the apex of his career, the Swiss artist elicited enthusiasm in the most important German galleries – Munich, Hamburg, Stuttgart, Berlin, Heidelberg, Dresden.

At the outbreak of the Great War, Fritz Osswald was summoned back to Switzerland to enrol for military service, from which he was afterwards discharged when he had passed the age limit.

Through intense collaboration with major art dealers like Ernst Arnold,[6] and galleries such as Heinemann,[7] Thannhauser and Brakl [de],[8] he achieved critical and popular acclaim until the mid-1930s.