As with contemporaries such as Hans Bohrdt, his greatest creative period came to an end with the abdication of the Kaiser and the passing of the Imperial era.

[6] Stöwer was a very prolific artist between 1892 and 1929, creating approximately 900 black-and-white and 335 color illustrations for 57 books, as well as posters, postcards, trading-cards, labels, brochures and calendars.

[8] Stöwer's representation of the sinking of the RMS Titanic in the magazine Die Gartenlaube earned him a special popularity.

He created the illustration shortly after the disaster in 1912 without detailed information; in particular, the fourth funnel did not eject black smoke as it was only for ventilation.

[14] In 1917, postcards were produced from some of his paintings for charitable aid to benefit wounded U-boat crew members and families of the deceased during World War I.